Hi, Jason-
I read this post and a couple of things jump out at me:

>lparamters tnvoterid
>=seek(tnvoterid,"votersfile","nfieldid") && parent table
>=seek(tnvoterid,"fielddetail",nfieldid") && child table
>set key to votersfile.nfieldid in fielddetail

1. you might want to check whether the SEEK()s are successful.
2. You pass the tag (the 3rd one) parameter to SEEK once with quotes and once without. Shouldn't it be one or the other?
3. If you are using SET KEY, why are you seeking in the child table?
4. You *might* need a LOCATE in the child table after the set key. (I'm not sure--it's been a while since I've looked at my SET KEY code :)

HTH