Workflow variable

[maddy]

Hy all!!
i have two question….

1) Any one tell me how we can set global variable null inside workflow????

2) how we get current swimlane in second time in a single task??

[mitpatoliya]

how you are trying to set workflow global variable as null? is simple varname=null; not working for you?
Is it activitii workflow or JBPM workflow?
and your second question needs more explanation.