IPDnnn

Explanation
(nnn = an even number from 162
through 254)
While scanning the last FORTRAN statement, the
syntax checker encountered a condition that should not occur.  It
may be a hardware, syntax checker, or system error.
In the message
text: nnn
An even number between 162 and 254.

System programmer response
Search problem reporting data bases
for a fix for the problem. If no fix exists, contact the IBM® Support Center. Provide the JCL and the assembly
listing for the job.

Source
FORTRAN syntax checker