I've got a cursor table that I'm trying to create temporary index tags for. I do this...

index on fieldname tag fieldname
set order to fieldname

...and it works. Then when I try and do it with another field, it tells me that the index file is read only and I can't write to it. I tried to...

DELETE TAG ALL

...then index the next field, but it gives me the same thing. If anyone can explain tags to me and what's going on I'd appreciate it!

Thanks