Mahdi k [https://community.jboss.org/people/mahdi1991] created the discussion "web process designer doesnt save my process definition when i add DataInputSet property for a task" To view the discussion, visit: https://community.jboss.org/message/811461#811461 -------------------------------------------------------------- hi, i'm creating a bpmn diagram (a process definition ) using JBPM 5 web process designer. when i draw a business task and go to FILE ----> SAVE CHANGES  , it will save it with no problem but when i go to the task's properties and add something in DataInputSet property , it won't save and says: Unable to perform user action due to error(s). Validate your process before saving, and view server logs to see error details. i have attached my server log . thank you so much! -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/811461#811461] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]