Problem:

The behaviour of VARCHAR2 host variables have changed in Pro*COBOL v8.0

You have VARCHAR2 host variables defined as PIC X(n) and are having problems with tests/compares in your WHERE clause after upgrading your version of Oracle.

Resolution:

Oracle have a configuration option for Pro*COBOL to revert back to the old behaviour.

In the $ORACLE_HOME/precomp/admin/pcbcfg.cfg file, add the following:

PICX=VARCHAR2

From now on by default, PIC X(n) host variables will no longer have the trailing spaces truncated unless you have this  configuration option.