[jboss-user] [jBPM] - how to setVariable

johennes fan [https://community.jboss.org/people/johennes] created the discussion "how to setVariable" To view the discussion, visit: https://community.jboss.org/message/776174#776174 -------------------------------------------------------------- Hello, After the process was started,I wan't to change the variable. Then I use this code: ((WorkflowProcessInstanceImpl) ksession.getProcessInstance(processid)).setVariable("aa", "bb") But it always call "java.lang.NullPointerException",I don't know why.  The code "getVariable()" works well. Anyone can help me ? -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/776174#776174] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]