I have a program wich uses a View in Buffering mode with an index.

When I index on the file in buffering mode appears the error :
command cannot be issued on a cursor in buffering mode.

so, I created the index with this operations :
Open the view with buffering propriety set to 1
Index on the file
set the cursor property buffering to 5

......everything goes well, I can insert,delete or modify records, but sometimes after a lot of operations made or after only moving throught records, appears the message error :
"Internal Consistency Error"

....are my operations correct ?
how can I use an Index with a view or cursor file, in buffering mode (type 5) ?
or why this message appears ?

Thank You very much
Bye from Italy