What type of database are you connecting to?  Based on the phrase "Database Vendor Code: 980", this is a database error not a Crystal error.  You need to look at the error codes for that database and determine what a "980" error is.  This will tell you what the exact problem is.

This is telling you that there is something in the formula that Crystal can't find.  Does the prompt {?My Parameter} exist and have a value?  Are you correctly setting the parameter values in your code?  What is the data type of {?My Parameter}?  You're treating it as if it were a number, but is the parameter actually a number?