delete processinstance information in database

[snowly]

Hello!
I want to delete processinstance and taskinstance information in my databaseafter i finishing using these in my program,but because some primary and foreign information,i failture to delete those process information in database;how i can implemente this ?
Every month,we will create new processinstance and finish it ,i hope to delete the finished process information for thinking of my memory!
thank you very much! I hope to receive your answers.

[enazareno]

try deleteProcessInstance from GraphSession instead, not from database (for Jbpm 3.0.2 version)

Regards,

Elmo