Description of problem:

Specific content of Free form DRL in RHS section of the Guided Rule breaks the specific rule completely.
Version-Release number of selected component (if applicable):
bpm suite 6.0.3 with rp#2 APPLIED

How reproducible:
ALWAYS

Steps to Reproduce:
1. Create guide rule
2. In THEN section add following line:
kcontext.getKnowledgeRuntime().startProcess("liability-rules.ContractCalculationProcess");
3. Save the rule and hit F5
4. Open the rule again - the screen is empty, no error, not possible to edit it anymore

Actual results:
With specific content in RHS the rule can't be opened after refresh.

Expected results:
The rule can be opened after refresh.

Additional info: