Maximum String length

[#1]

Hi, have a simple question. What is the maximum string length that can be declared in a workflow process?

I tried figure that is more then 2K and when saving the workflow process, It cannot be saved and there is error message prompted. After which, sometime the workflow will go inactive and from then onward, it cannot be turn active. This does not always happen. Thanks.

[pguerett]

By default it is 256 bytes. If you use a -1 for string length you are basically saying that it has no length