NX Nastran DMAP Programmer's Guide - Kxcad.net

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OUTPUT2
Output a table or matrix into a FORTRAN readable file
MAXR Input-integer-default=2 * BUFFSIZE words. Maximum physical
record size. (See Remarks.)
NDDLNAMi Input-character-default=blank. NDDL names corresponding to DB1
through DB5. If DBi is a matrix, then the corresponding
NDDLNAMi is 'MATRIX'. (See Remarks.)
Remarks:
1. A data block (table or matrix) consists of logical records:
• In matrices, each column is contained in one logical record. Each record
begins with the row position of the first nonzero term in the column followed
by the first through the last nonzero term in the column.
• In tables, the contents of logical records vary according to the table but are
described in “Data Blocks” in Chapter 2.
2. The FORTRAN binary file consists of physical records of data from the data block
and KEYs that are provided to assist in the reading of the file. Each physical
record of data is separated by one-word records called KEYs. The KEYs will
indicate one of the following depending on its location in the binary file:
KEY Description
>0 The length of the next physical record. It may also indicate the
start of a new logical record.
0 End-of-File (data block) (EOF) or End-of-Data (EOD).