What means: Throwing PL/SQL internal error ptbld: LUT overflow.

We ported from Forms 11.1.2.2.0 to 12.2.1.19.0 on Linux and use Webutil. After a frequent use of CALL_FORM (..NO_SHARE_LIBRARY_DATA) folowed by EXIT_FORM (approximately 500-700 times) Forms slowdown and the Message "Throwing PL/SQL internal error ptbld: LUT overflow." is written to a file in /tmp folder.

A sample file is attached.

With the environment parameter FORMS_LIMIT_EXTERNAL_MESSAGES=1 this messages are suppressed, but the behavior resides: the application is unusable. It takes to 2 minutes to change back to the calling form. Further SQL Operations (i.e. Post-Query) are very slow.

Using CALL_FORM (..SHARE_LIBRARY_DATA) does not resolve the issue; it only delays its occurrence.