A
Compiler Implementation Specifications
The following list summarizes the specifications and restrictions for the Compaq
COBOL compiler. The compiler issues diagnostic messages whenever you exceed
its design parameters.
• Run-time storage (generated object code and data) for COBOL programs
cannot exceed 2,147,483,647 bytes.
• The length of an FD’s record cannot exceed 32,767 bytes for a sequential file,
32,234 bytes for an indexed file, or 32,255 bytes for a relative file. For SD
records, the length cannot exceed 32,759 bytes for a sequential file, 32,226
bytes for an indexed file, or 32,247 bytes for a relative file.
• On OpenVMS, bucket size for relative and indexed files cannot be greater
than 63.
• A sequential disk file’s multiblock count cannot be greater than 127.
• The physical block size for a sequential tape file must be from 20 to 65,532
bytes, inclusively. ♦
• Run-time storage for an indexed file’s RECORD KEY or ALTERNATE
RECORD KEY data item must not be greater than:
• 255 bytes on OpenVMS Alpha systems
• 120 bytes on Tru64 UNIX systems
• 128 bytes on Windows NT systems
• The number of bytes in the string making up a VALUE OF ID file name or
data name must not exceed 255.
• The number of indexed file RECORD KEY and ALTERNATE RECORD KEY
data items must not exceed 255 per file.
• The maximum number of segments in a segmented key is eight.
• The number of literal phrases specified to define an alphabet in an
ALPHABET clause of the SPECIAL-NAMES paragraph must not be greater
than 256.
• The value of a numeric literal in a literal phrase of an ALPHABET clause
must not be greater than 255.
• The value of a switch number in the SWITCH clause of the SPECIAL-NAMES
paragraph must be from 1 to 16, inclusively.
• The value of a numeric literal in the SYMBOLIC CHARACTERS clause must
be from 1 to 256, inclusively.
• On OpenVMS, the value of an integer in the EXTENSION option of the
APPLY clause must be from 0 to 65,535, inclusive.
Compiler Implementation Specifications A–1
