Hello,

looks like your column is too large to fit in a single *.idx File,
if i remember correct there is a limit of 120 chars when buildind standalone
idx indexes, so either build a index like LEFT(yourColumn,120) (could be bad because of rushmore optimization issues)
or put the index in an cdx file with:

INDEX ON yourcolumn TAG yourColumn OF "yourcdx.cdx"

Regards

Christian