Errors with contract clause question type and contract generation

Dear Colleagues,

I am struggling with two errors in SAP Sourcing 10.

1. First one occurs when I try to create "Contract Clause" question type in RFx. After setting all values for that kind of question in "Create new question" screen and clicking OK I get below error. I don't have that problem with other types of questions.

2. Second one occurs when I try to generate a contract from RFx. In the contract I want to have listed all the questions from RFx, so during creation of questions I used option Contract Variable and I connected each question with a proper token. All related screens are below:

Token settings:

Question settings:

Word template:

And when I invoke contract generation I get below error:

Do You have any clues what may be wrong?

Thanks in advance,
Przemyslaw