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Expression validation failed.

Technote (troubleshooting)


When using IBM Debugger, mouse-over any variable in a COBOL for AIX program. Unable to view its value.


Environment variable LIBPATH is not set.



Diagnosing the problem

Be sure the debugger is installed. Type

lslpp -l ibmdebugger*

lslpp -l cobol*

lslpp -f cobol*


Resolving the problem

The LIBPATH must point to the location of files derdecb1 and derdcob1. These files are usually in directory


Cross Reference information
Segment Product Component Platform Version Edition
Software Development COBOL for AIX Debugger 3.1

Document information

More support for: IBM Debuggers
IBM Debugger for AIX

Software version: 6.0.1

Operating system(s): AIX

Reference #: 1417738

Modified date: 27 October 2010