At 04:17 PM 4/7/2014 +0300, Layale Bassil wrote: [snip]

Thanks a lot for your valuable explanation... well your explained my case perfectly well. I cleaned the data by truncating the needed tables and now I am organizing my holdings into tag 952 as you suggested.

That's fine for the 952s in marc-edit, but in your original request, you wrote

...

...

I am running Koha 3.14. I imported several batches for testing purposes [snip]

I need to delete all the previously imported records and start a fresh clean catalogue. Any suggestions would be greatly appreciated. ^^^^^^^^^^^^^^^^^^^^^

Having gone through this many dozens of times testing various versions and upgrades, I have always found it easier to restore the backup of the "virgin installation" of the MySQL dump, and if you did not back it up, might suggest that a brand new re-install would get rid of any glitches that you possibly may have overlooked in your various "clean ups." Best -- Paul