i get a 'PostPrepare' script failed with exit code '1' message on one of the bundles, and i think i am missing some obvious thing

it is a simple file bundle, to distribute a pdf printer:

it distributes 2 files:
ADIST.PPD to /usr/share/cups/model
pdf-printer to /usr/lib/cups/backend
(script based upon Cool Solutions: A CUPS PDF Printer for your SUSE Linux Enterprise Desktop

then it should execute a pre-installation script that executes:
Code:
#!/bin/bash
rccups restart
mkdir -p /export/share/pdf
chmod -R 777 /export
lpadmin -p Desktop-PDF -v pdf-writer:/export/share/pdf/ -E -P /usr/share/cups/model/ADIST5.PPD -D "PDF Writer for CUPS" -L "PDF on desktop"
manually placing the files on these locations and executing the script works fine

on the machine i get (device set to log debug and above)
Code:
22 Jul 2010 09:33:00 INFO  BundleManager        Executing preprepare scripts for PDF printer
22 Jul 2010 09:33:00 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:00 INFO  WebCache             Attempting to retrieve 'https://zlmserver/zenworks-pkgmgt/repo/getBundleFile/3ba56c5bc95bb2874273a7d0cae07d14/8/sled-11-i586/ADIST5.PPD' (try 1)
22 Jul 2010 09:33:01 INFO  WebCache             Successfully retrieved https://zlmserver/zenworks-pkgmgt/repo/getBundleFile/3ba56c5bc95bb2874273a7d0cae07d14/8/sled-11-i586/ADIST5.PPD
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 INFO  WebCache             Attempting to retrieve 'https://zlmserver/zenworks-pkgmgt/repo/getBundleFile/3ba56c5bc95bb2874273a7d0cae07d14/8/sled-11-i586/pdf-writer' (try 1)
22 Jul 2010 09:33:01 INFO  WebCache             Successfully retrieved https://zlmserver/zenworks-pkgmgt/repo/getBundleFile/3ba56c5bc95bb2874273a7d0cae07d14/8/sled-11-i586/pdf-writer
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 INFO  BundleManager        Executing postprepare scripts for PDF printer
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 INFO  BundleManager        Successfully prepared bundles
22 Jul 2010 09:33:01 INFO  BundleManager        Beginning bundle transaction
22 Jul 2010 09:33:01 INFO  BundleTransaction    Beginning bundle transaction: 1 installs, 0 removals.
22 Jul 2010 09:33:01 INFO  BundleTransaction    Executing preinstall scripts for PDF printer
22 Jul 2010 09:33:01 INFO  SystemCatalog        Saving system catalog containing 9 bundles
22 Jul 2010 09:33:01 ERROR BundleTransaction    Novell.Zenworks.Zmd.BUNDLE_INSTALL_ERROR: Novell.Zenworks.Zmd.BUNDLE_INSTALL_ERROR
Novell.Zenworks.Zmd.Public.ZenException: 'PreInstall' script failed with exit code '1'
22 Jul 2010 09:33:01 INFO  Progress             Progress.Stop Message: Bundle transaction failed: 'PreInstall' script failed with exit code '1'
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 ERROR BundleManager        Transaction failed: Bundle transaction failed: 'PreInstall' script failed with exit code '1'
22 Jul 2010 09:33:01 INFO  Progress             Progress.Stop Message: Parent failed/aborted
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 INFO  Progress             Progress.Stop Message: Parent failed/aborted
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 INFO  Progress             Progress.Stop Message: Parent failed/aborted
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 INFO  Progress             Progress.Stop Message: Parent failed/aborted
22 Jul 2010 09:33:01 DEBUG Progress             Is Stopped value: False
22 Jul 2010 09:33:01 ERROR ActionManager        Failed to execute scheduled action (install (bundles=3ba56c5bc95bb2874273a7d0cae07d14)): Bundle transaction failed: Bundle transaction failed: 'PreInstall' script failed with exit code '1'
Novell.Zenworks.Zmd.Public.ZenException: Bundle transaction failed: Bundle transaction failed: 'PreInstall' script failed with exit code '1'
22 Jul 2010 09:33:01 INFO  BundleTransaction    Bundle transaction ended.
clients: sled11sp1 i586
server: sles11 x64 + zlm732

the files are not copied to their destination
the target directories are available, writable by root (obviously) there are no files with the same name available, adding a trailing slash to the target path does not help (but other bundles have no trailing slash and run ok)

questions:
  1. where are the temporary files copied to?
  2. where/how can i find what might be causing the preinstall error?
  3. should i delete previous versions of the bundle in zlm