>>Hello!
>>
>>I have this strange program error "Must specify additional parameters." whenever I try to set relationship between two tables using Relations button in Data Session dialog window. When I clicked ignore, I got Environment Manager dialog screen. I don't understand what is causing this strange behavior. I'm unable to set relationship via Data Session window however I have no problem setting relationship manually via the Command window. Then, after manually setting relationship, I went back to the Data Session window and double-clicked on the relationship line in Relations, I got the same error message, after clicking ignore, I got syntax error message, then the Environment Manager window. After clicking Cancel, I got "Function requires row or table buffering mode." Hmm... got any ideas why this is happening?
>>
>>TIA...
>
>What is the key of the tag of the child table? May be you use some function that requires additional parameters.

Nope, that's not the case. It's a problem to any tables in the Data Session window, even the simplest ones. No problem setting relationships in the Command window.