My task can't be completed. when the jsp executes
Element dataitem = wirData.getChild(varName);
the dataitem remains null so the wqClient can't complete successfully. I checked the code, the specification, compared it to the examples, reinstalled Yawl and libraries.

LoginForm.txt (4.87 KB)

It was caused by the workflow variables without an initial value.

I am glad that you could resolve this one. You are currently on a deeper technical level which makes it hard to give support from the outside. 

Regards,

Andreas