swf compilation failed

Hi, I am getting this message on the screen. In the help I am finding some tools for this error solving. I am changing adobeCaptivate.ini file adding Use32BitJVMForPublish = 1. The problem is not resolved. In the next step is mentionned : Invalid characters are present in text fields such as Project Information, Email, Description, Name, and Slide Name in your project. What characters should i look for as not allowed?
Can you advice? I have more own courses. Some of them are with this error, some of them are working without problem.
Thanks
