NX Nastran DMAP Programmer's Guide - Kxcad.net

OUTPUT2
Output a table or matrix into a FORTRAN readable file
• Easier initial usage of OUTPUT2. Most users make several errors while
becoming familiar with the formats.
• User code is not burdened/concerned with physical record boundaries.
• Data can be processed in logical groups rather than in a "blast" read mode.
Major limitations include:
• Matrices cannot be processed in this manner.
• Multiple FORTRAN units cannot be simultaneously processed.
• BACKSPACE operations are not permitted.
Following are descriptions and use of the three OUTPUT2 service routines.
Entry
Point
Description
IOPEN Initializes an OUTPUT2 file and read the label (NX Nastran).
Format:
CALL IOPEN(IUN,L)
where IUN = An input integer which specifies the unit number to be
read.
L = An output two-word array (2A4) containing the label written on
the unit (L comes from the third parameter in the DMAP call).
Method:
IOPEN rewinds IUN and reads in the data, title, and label. The keys are
checked. A key check failure results in the message IOPEN BAD KEYX
= XXXX.
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