key-commit trigger raised error ORA-04062

I guess you need to debug to find the actual problem by adding debug messages to your code.

you can also check these to see if they help you.

http://orafinappssetups.blogspot.sg/2013/01/ora-04062-signature-of-package-has-been.html
https://community.oracle.com/thread/357937
http://www.dba-oracle.com/t_ora_04062_string_of_string_has_been_changed.htm
http://www.orafaq.com/forum/t/61471/

I tried to compile the forms in form builder with the database 12c and the so many errors appeared ORA-00600 internal error code , arguments (16203) ()()()()()
but when i compile the forms with the database 10 g no errors appear
how to solve the errors in database 12C

I think that you ought to contact Oracle Support. It seems that your Form version is not compatible with your database 12c.

What do you see in the form builder Help->About Form Builder ? Here is mine:
Forms [32 Bit] Version 11.1.1.6.0 (Production)
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
     With the Partitioning, Oracle Label Security, OLAP, Data Mining,
     Oracle Database Vault and Real Application Testing options
Oracle Toolkit Version 11.1.1.6.0 (Production)
PL/SQL Version 11.1.0.7.0 (Production)
Oracle Procedure Builder V11.1.1.6.0 - Production
PL/SQL Editor (c) WinMain Software (www.winmain.com), v1.0 (Production)
Oracle Query Builder 11.1.1.6.0 - Production
Oracle Virtual Graphics System Version 11.1.1.6.0 (Production)
Oracle Tools GUI Utilities Version 11.1.1.2.0 (Production)
Oracle Multimedia Version 11.1.1.6.0 (Production)
Oracle Tools Integration Version 11.1.1.2.0 (Production)
Oracle Tools Common Area Version 11.1.1.6.0
Oracle CORE      11.1.0.7.0      Production

this is the Help->About Form Builder

Forms [32 Bit] Version 6.0.8.11.3 (Production)
Oracle Toolkit Version 6.0.8.25.0 (Production)
PL/SQL Version 8.0.6.3.0 (Production)
Oracle Procedure Builder V6.0.8.21.0 Build #1459 - Production
PL/SQL Editor (c) WinMain Software (www.winmain.com), v1.0 (Production)
Oracle Query Builder 6.0.7.0.0 - Production
Oracle Virtual Graphics System Version 6.0.5.38.0 (Production)
Oracle Tools GUI Utilities Version 6.0.8.25.0 (Production)
Oracle Multimedia Version 6.0.8.25.0 (Production)
Oracle Tools Integration Version 6.0.8.10.2 (Production)
Oracle Tools Common Area Version 6.0.8.18.0
Oracle CORE Version 4.0.6.0.0 - Production

As I see it is Forms 6i and database 8.

You can try to use Forms 11. Maybe it will run with 12c database. If you have Oracle Support ask them what you can do.

I think that we cannot help you here more.

I recompiled my forms
and my library and procedures one by one then its working fine

Thank you