[Keldog]

sorry if a search could've answered this for me, a bit strapped for time.
a users phone keeps getting these errors;
stack overflow
when you try to enter a zero:
input system error java lang nullpointer exception
when attempting to open the address book:
net_rim_bb_addressbook.app(263) not responding.
thanks in advance for any help...

[John Clark]

What kind of BB device? Any 3rd party apps? You're probably going to have to wipe the device to figure out what's causing it.

[dodgydane]

corrupt handheld software perhaps?
I'd also say wipe it and if that doesn't do it, then reinstall the handheld software.
Maybe even upgrade it while you're at it?

[Keldog]

thanks for the help. i just wiped it. something corrupt from our exchange server i suspect. thanks again for the assistance...