Sometimes when i have to use SPB Backup it causes my PIM information on the Desktop to "double" its contents (eg. the numer of Contacts, Calender reminders are doubled).

In order to try and resolve this i thought to DELETE the PIM information on my PPC and just do a normal Sync with the Desktop. When i try to delete the pim.vol file on the PPC it wont let me saying "the source or destination file may be in use".
Does someone have any idea how this can be done easily??

Can someone also suggest to me how to delete double identical entries in my Contacts & Calender either on the PPC or Desktop or both??

To get around the fact of double entries on the ppc you should have no contacts installed in out look when you sync after restoring a backup.

To do this you must Firstly ensure that your device is NOT connected to your pc before you do this.
That point is very important as if it is you will lose all contacts on both device and pc.

How i do it, is to leave the contacts on the device and open up outlook and go to my contacts and then click once on one of the contacts and then press ctrl + a , this will select all contacts then simply press delete and all contacts will be deleted. then sync your device as normal

If you have already synced it and have double contacts on device and pc, then simply go into the contacts on outlook and while holding the CTRL key down click once on every duplicate you have and press delete and hopefully if you have done it right then now you will have one copy of each contact on ppc and pc.

First of all thanks for your tips (-which i already knew).
Still my real question is how to delete the pim file on my PPC this way when i Sync with my PC the PC Pims will update the PPC without duplicates in either the PC or the PPC.
By the way in outlook i always first make a Backup copy of my Contacts under a new Contact Subdirectory which is not affected when Sync with the PPC after which if i get duplicate Contacts in the PC main Contact directory i then just delete them all and copy the contacts from the subdirectory (i made before) to the main Contactt directory.

In order to try and resolve this i thought to DELETE the PIM information on my PPC and just do a normal Sync with the Desktop. When i try to delete the pim.vol file on the PPC it wont let me saying "the source or destination file may be in use".
Does someone have any idea how this can be done easily??

You can use SKTools http://forum.ppcwarez.org/viewtopic.php?f=49&t=30594&hilit=sktools BTW, IMHO, its Backup module is better that SPB backup

Here is the solution i got from the forum of
xda-developers.

shaileshashar
To Delete PIM, just rename PIM to something else in 'my device'.
Soft reset - now there will be a new PIM created. You can now delete the one you renamed.