The results of object method and task are different

[Kim, Go Joong]

Dear workflowers,
 
I tested the SetStatus method of DRAW (Document) object type and the task
referencing that method.
Its function is to change the document status.
But I found the extraordinary result.
When I try to change the document status through the object method, it is
failed.
But when testing through the task, the document status is changed as
expected.
I am very confused about this because I use same input parameters.
 
Any opinion will be appreciated.
 
Best regards,
Gojoong Kim (Steve)