Limitations

Evaluation cannot be done for any process diagram. Unfortunately, there are some limitations. If a process contains a Join step then evaluation is only possible if its all joining branches start from the same parallel step and all branches of this parallel step end eventually in a sink or a join step (so, in fact the Join steps are only used in a fork-join construct). If this is not the case you will get a message:

For example, the following diagram can be evaluated because we can recognize here the following fork-join pairs: 4-6, 5-6, 7-8 and,7-9

The following diagram cannot be evaluated because not all branches starting in the parallel step 4 or 5 end in the join step 7: