Xerox 6180N Using LCDS Print Description Language - Page 126

Specifying input parameters BLOCK command: points to note Note the following when using the BLOCK command: • The values for LTHFLD, OFFSET, FORMAT, and PREAMBLE may be overridden if RECORD STRUCTURE is changed as the result of ANSI or IBM OS/Standard label processing. • The length of the block delimiter constant should not be coded as the BLOCK POSTAMBLE. Both lengths are subtracted from the end of the block. • The search for the block delimiter constant starts after the block preamble and proceeds forward to the first appearance of the constant. • Using online JDEs in offline JDLs: An offline JDL statement set that modifies the system default values, specifically in the BLOCK or RECORD commands, may experience incorrect results if an online job (JDE) is running. In other words, if an online JDE is specified in an offline JDL that has changed the system default values of the BLOCK and RECORD command parameters, the job may not print correctly. You should separate and run online and offline jobs (JDEs) independently of each other. CAUTION If a block delimiter constant is positioned and is part of a record or block, the record or block is truncated. As a result, the data is not formatted as specified. Block command example The BLOCK command for the example in the following figure would be coded as follows: BLOCK LENGTH=351, OFFSET=2, ADJUST=0, LTHFLD=2, PREAMBLE=8, FORMAT=BIN; The following diagram shows sample values for BLOCK command parameters. 2-18 Using LCDS Print Description Language