Error message "Cannot use or tag on Nullable key"

[PK]

I have never come across this error message in earlier versions of R&R.__This error message pops up when I try to establish a one to one relation between the 2 dbf tables using cdx index file selecting a tag.__Any comments?

[kfleming]

This is a real restriction. You probably have not used any indexes with nullable keys in earlier versions which is why you have not seen it until now.____Kathleen__R&R Support

[PK]

Thanks.__I am not even sure what this nullable key is.__Now how do I avoid this from happening.__The structure of the files remain same. __Except that the files I was using earlier were foxpro files with cdx index files and now these files have somewhat similar structure but in visual foxpro with cdx index files.__The tags are also the same. __Is there anyhting I am missing?__Pls help!!!!

[kfleming]

If you open the table in the Foxpro table designer and look at the structure, you will see a column called Null. If there is a checkmark in that column for any field that is used in your index, then you will see the error.____If you remove the check and restructure the file, the error will no longer appear.______Kathleen__R&R Support

[PK]

Thanks. But will it affect the application. The application is accounting package called "SBT Pro Series" from AccPac. I am not sure if you r familiar with this package. __Lastly what is the significance of thie field?__Thanks again.__