Modify existing workflow

Question

We need to modify existing workflow in UCM but only known approach - disable step and enable it. Is any alternative way to change it UCM workflow code?

Answer 1

While directly writing IDOC script in the applet window is perfectly acceptable, you will experience some need to change it, thus your dilemma of having to disable the workflow in order to edit it.
It is a much better practice to put your IDOC logic in a component within a dynamichtml include, and simply reference the include in the applet.
For example, let's say your workflow is named "MyWorkflow" and you have a step called "Step1".  To create code in the entry step, in a custom component create a dynamichtml include called "my_workflow_step_1_entry"
<@dynamichtml my_workflow_step_1_entry@>
do something
<@end@>
Then in the workflow applet for "MyWorkflow" --> "Step1" entry event, simply put the following code
<$include my_workflow_step_1_entry$>
Now you can edit the code in the component resource file rather than the applet, and certainly don't have to enable/disable the workflow.
The one caveat here is that changes to the resource file code will require a server restart in order for the changes to take effect, as workflow code is cached differently as I recall.  There is another way to get around that limitation, but I'll leave that solution for a blog post.