I have a column defined in SharePoint as "Single line of text" when I deploy my webpart, and try to enter text in the field I get the following error from my log file:
"Error converting data type varchar to numeric."
This works in my development environment, but not in my production. I have triple checked my column type, but still get this error. I am able to enter numeric values in the field and it saves just as desired, however when I try to enter text I get the error.
I may have once had the column defined as number, and changed it to "Single Line of text". I'm afraid it's holding on to the previous column type definition.