Compaq DECprint Supervisor (DCPS) for OpenVMS
User's Guide


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Chapter 14
Controlling File Separation Pages

The printing system can produce both job separation pages (job burst pages, job flag pages, and job trailer pages) and file separation pages. The system manager can define the job separation pages and default file separation pages for the queue. Users cannot affect the job separation pages, but can control whether to print file separation pages.

Files in a print job can be separated by:

You can control the inclusion of file flag pages using the following PRINT command qualifiers:

14.1 Controlling File Separation Pages for All Files

You can specify the default file separation behavior for all files in a print job by placing the /[NO]BURST, /[NO]FLAG, and /[NO]TRAILER qualifiers between the PRINT command and the first file specification.

For example, the following command will print a file burst page before each file:


$ PRINT /BURST FIRST.TXT, SECOND.TXT

If you do not specify the behavior for a type of file separation page (for example, the above command does not specify flag or trailer pages), the default behavior is as specified by the queue's /DEFAULT qualifier. If /DEFAULT does not specify a particular type of separation page, then none is generated.

The negated qualifiers (for example, /NOTRAILER), are useful in overriding a queue's default qualifier (for example, /DEFAULT=TRAILER).

14.2 Controlling File Separation Pages for Individual Files

You can alter the default file separation page behavior for individual files within a print job by placing the qualifiers after the corresponding file specifications.

For example, you can use the following command to override a queue's /DEFAULT=BURST qualifier and instead print file flag pages for all but the second file in a job:


$ PRINT /NOBURST /FLAG FIRST.TXT, SECOND /NOFLAG, THIRD

14.3 Displaying the Default Separation Pages for a Queue

To see the default separation pages for a queue, enter the following command:


$ SHOW QUEUE /FULL PS20$A14


Printer queue PS20$A14, on STAR::LPS, mounted form DCPS$DEFAULT 
(stock=DEFAULT) 
    /BASE_PRIORITY=4 /DEFAULT=(FLAG,FORM=DCPS$DEFAULT (stock=DEFAULT)) 
    /NOENABLE_GENERIC /LIBRARY=DCPS_LIB Lowercase /OWNER=[SYS,SYSTEM] 
    /PROCESSOR=DCPS$SMB /PROTECTION=(S:E,O:RD,G,W:W) 
    /SCHEDULE=(NOSIZE) 
    /SEPARATE=(BURST,TRAILER) 

This display shows that the job burst pages and job trailer pages are printed for print jobs sent to this queue (/SEPARATE=(BURST,TRAILER)). File flag pages are printed by default, as indicated by /DEFAULT=FLAG, but can be overridden by PRINT command qualifiers.

14.4 Job Log and Trailer Pages Sent to Default Tray On Error

The job log and job trailer pages, if any, are normally directed to the output tray you specified with the OUTPUT_TRAY parameter. However, if DCPS reports a NOOUTTRAY, OUTTRAYNOTAVL, or OUTTRAYMISMATCH error when initially attempting to select the specified output tray, the job log and trailer pages are instead directed to the printer's default output tray so that you get an indication of the problem.


Chapter 15
Selecting Finishing Options

Some printers have a finisher, often sold as an option, that can punch or staple your output. This chapter describes how to select these printer features from DCPS.

15.1 Punching

DCPS can punch your job if the printer has a puncher installed. Punching with DCPS is supported on the following printers:

GENICOM Intelliprint mL450
GENICOM LN45
Lexmark Optra W810
Lexmark W820

15.1.1 PUNCH DCL Syntax

Punching is specified with the PRINT parameter PUNCH.

$ PRINT /PARAMETERS=(..., [ PUNCH | NOPUNCH ] ,...) file_name

There are no values to the PUNCH parameter. The position of the punched holes is determined by the orientation of the paper in the printer, and the number and spacing of holes is determined by the printer. When NOPUNCH is specified, the job is printed without punching, overriding the printer's default punch setting.

15.2 Stapling

DCPS can staple your job if the printer has a stapler installed. Stapling with DCPS is supported on the following printers:

Compaq Laser Printer LN32
Compaq Laser Printer LNM40
GENICOM Intelliprint mL450
GENICOM LN45
GENICOM LNM40
GENICOM microLaser 320
GENICOM microLaser 401
HP LaserJet 8000
HP LaserJet 8100
HP LaserJet 8150
HP LaserJet 9000
Lexmark W820

15.2.1 STAPLE DCL Syntax

Stapling is specified with the PRINT parameter STAPLE.

$ PRINT /PARAMETERS=(..., STAPLE = [ LEFT_CENTER | TOP_CENTER | TOP_LEFT | TOP_RIGHT | NONE ] ,...) file_name

These values specify the position of the staple with respect to the orientation of the image on the paper. When NONE is specified, the job is printed without stapling, overriding the printer's default staple setting.

15.2.2 Stapling Positions

Some of the values for the STAPLE parameter are not always possible, depending on the direction in which the paper is fed through the printer. See Table 15-1 for possible stapling positions depending on your job's page orientation and the printer's paper feed direction. In the table, "Port" and "Land" refer to portrait and landscape page orientation, and "LEF" and "SEF" refer to long-edge-feed and short-edge feed direction of paper in the printer.

Table 15-1 Stapling Positions and Paper Feed Direction
  Staple Position and Image Orientation
  TOP_LEFT TOP_CENTER TOP_RIGHT LEFT_CENTER
Printer Brand Port Land Port Land Port Land Port Land
Compaq, GENICOM, Lexmark, Xerox LEF, SEF LEF, SEF SEF LEF SEF LEF LEF SEF
HP LEF, SEF   SEF LEF   LEF LEF SEF

If you specify an unsupported staple position, DCPS issues the error message STPPOSNOSUP and does not print the job.

15.2.3 Output Trays

Stapled output can only be delivered to the output trays attached to the finisher. Table 15-2 lists the supported output trays for each printer.

Table 15-2 Output Trays Supported for Stapling
Printer Brand Output Trays
Compaq, GENICOM, Xerox STACKER / BIN_1
  BIN_2
  BIN_3
HP, Lexmark STACKER / BIN_2

If you specify a tray not supported for stapling, or do not specify a tray but the printer's default output tray is not supported for stapling, DCPS issues the error message STPOUTTRAY and does not print the job.

15.2.4 Paper Sizes

Printers do not support stapling on every paper size and feed direction. See Table 15-3 for a list of paper sizes and feed directions not supported. If neither feed direction LEF (long-edge feed) or SEF (short-edge feed) is listed, neither feed direction is supported for that size.

Table 15-3 Paper Sizes and Feed Directions Not Supported for Stapling
Printer Brand Paper Size and Feed Direction
Compaq, GENICOM 7_ENVELOPE (LEF)
  A5 (SEF)
  A6 (SEF)
  BUSINESS_ENVELOPE (LEF)
  C5_ENVELOPE (LEF)
  DL_ENVELOPE (LEF)
  HALFLETTER (SEF)
HP 7_ENVELOPE
  B5
  BUSINESS_ENVELOPE
  C5_ENVELOPE
  DL_ENVELOPE
Xerox A6 (SEF)
  7_ENVELOPE (LEF)
  BUSINESS_ENVELOPE (LEF)
  C5_ENVELOPE (LEF)
  DL_ENVELOPE (LEF)

If you specify a size that cannot be stapled, DCPS issues the error message STPSIZENOSUP and does not print the job.

15.2.5 Stapling Details

Please note the following details when using stapling with DCPS:


Chapter 16
Using the Error Handler to Debug

The device control library includes an error handler to help debug PostScript programs. The error handler prints the last partial page of output, as well as information to help identify the error.

16.1 Including the Error Handler in a Print Job

The error handler is not automatically included each time a job prints (unless your system manager has changed this default). Therefore, you must explicitly invoke it, as follows:


$ PRINT/SETUP=LPS$ERRORHANDLER filename

The error handler returns PostScript messages. You can send these messages to a file or printer by using the /PARAMETERS=MESSAGES qualifier as described in Chapter 17. For example:


$ PRINT/QUEUE=PS40$A10/PARAMETERS=MESSAGES=KEEP FILE.PS

If you are developing PostScript applications, you can make the error handler easier to access by defining a form to include the error handling setup module, as described in Chapter 12.

16.2 How the Error Handler Affects the PostScript Environment

The error handler references operators from the dictionary systemdict, rather than using definitions that may have been modified by the user program.

In some cases, a program can behave differently when the error handler is loaded. For example, executing the exit operator outside a looping context causes an invalidexit error if the error handler is not loaded. However, if the error handler is loaded, the program exits without generating an error.

16.3 Error Handler Example

The sample log file in Example 16-1 is for the following PostScript program:


[/1st-level [/2nd-level [/3rd-level [/4th-level 56 ] ] ] (end)] 
/myproc { [ 8 8 ] 0 0 div setdash } def 
100 200 moveto 
myproc 

The following command includes the error handler and causes a log file to be generated:


$ PRINT/PARAMETERS=MESSAGES=KEEP/SETUP=LPS$ERRORHANDLER filename

Example 16-1 shows the error handler output that is appended to the log file when the program executes.

Example 16-1 Sample Error Handler Log File

ERROR: undefinedresult (1)
OFFENDING COMMAND: div (2)
 
OPERAND STACK:  (3)
 
0 
0 
[ 8 8 ] 
[/1st-level [/2nd-level [/3rd-level  -array- ] ] (end) ] 
 
EXECUTION STACK: (4)
 
{ setdash } 
 
GRAPHICS STATE:  (5)
Current Matrix: [ 4.16667 0.0 0.0 -4.16667 0.0 3298.0 ] 
Color: 0.0 
Current position: x = 100.0, y = 200.0 
Line width: 1.0 
Line cap: 0 
Line join: 0 
Flatness: 1.0 
Miter limit: 10.0 
Dash pattern: [ ] 0.0 

The array defined at the start of the example file is expanded three levels deep. The innermost version of the array is represented simply as --array--.

16.4 Reading Error Handler Output

When an error occurs, the error handler executes a showpage command to print the last partial page of output (see Example 16-1). It also gives the following information:

  1. The name of the error
  2. The PostScript operator that encountered the error
  3. The contents of the operand stack
    The error handler displays the value of each object on the stack, with numbers in decimal. All elements of arrays and procedures are displayed recursively to a maximum depth of three levels. Indicators describe other objects, for example, --savelevel-- for a save object.
    The first item displayed is the object on the top of the stack.
  4. The contents of the execution stack
    The execution stack contains partial procedures that are being executed. The top object is a procedure that contains the operators and operands still to be executed. The second object is the unexecuted part of the calling procedure.
  5. Information about the graphics state:
    Current transformation matrix
    Color (a currentgray value)
    Current position
    Line width
    Line cap
    Line join
    Flatness
    Miter limit
    Dash pattern

When you find an error in the PostScript code, you should modify the application that produced the file, or inform the applications programmer of the problem.

16.5 PostScript Data Output Format

PostScript data is easily identifiable, usually in the way the data appears in a PostScript source file. The error handler represents PostScript data as follows:

The PostScript language may be extended to include new data formats that are unknown to the error handler. Data in unknown formats is represented as two question marks followed by the name of the unknown data format.

16.6 Determining Where the Error Occurred

It may be impossible to determine exactly where in the PostScript stream the error occurred, because the execution stack may not uniquely identify the context. In this case, you can add diagnostics information to the PostScript file. For example, if the error appears to be related to a showpage definition, modify your PostScript code as follows:


/myshowpage 
   { 
   (At the top of my showpage\n) print flush 
   % some PostScript code 
   (Just before real showpage call\n) print flush 
   showpage 
   } def 


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