Hi Tihomir,
Thank you very much for your response. We actually found out that the problem is caused by an unnamed lane. We created a lane but we didn't assign any name. We then added the start, task and end nodes and the process was not saving. Once we assigned a name to the lane, the process saved successfully.
I am very glad to know jBPM 5.2 will be released soon and I take the opportunity to ask, will it be possible to run Guvnor and Designer on an IP different from localhost and a port different from 8080? Currently JBoss can be configured to respond on IP/Port other than localhost and 8080 but Designer does not save the process model. I understand the localhost and port 8080 are hardcoded in some classes. Will this be configurable in jBPM 5.2?
Thanks a lot again.