On Aug 30, 2008, at 1:16 AM, Sam Rowlands wrote:
Hi Kimball,
Congratulations on having a successful product. I don't know if
these suggestions will help, but I thought I would suggest them
anyway.
1) Check to make sure that the printersetup object is not nil before
passing it to the printerdialog. If its Nil then create a new
printersetup.
2) Check the printersetup's width and height, if they are 0 or less
then create a new printersetup.
I am not sure where it happens or how it happens, but sometimes I
have found that my printersetup becomes useless either by becoming
nil or by having a width or height of 0 (or less).
I hope these help and wish you a great weekend.
Sam,
Thanks for the suggestion - I have attempted to make the call like this:
g = OpenPrinterDialog(new PrinterSetup)
It still fails.
I suppose the next step would be to see if the PrinterSetup
constructor is returning an invalid or nil PrinterSetup object.
-- Kimball
On Aug 30, 2008, at 3:08 PM, realbasic-nug-request@lists.realsoftware.com
wrote:
I have a userbase of several thousand users, on a mix of Win 2000,
XP,
Vista, and OS X 10.x. Most all of them print from my application
on a
regular (daily) basis with no problems.
Yesterday I heard from a user on Vista who is having problems. Big
problems:
When he hits the print button, the application crashes - so hard, in
fact, that no exception is ever even thrown. The app simply goes
away.
I have very verbose logging installed in my app, and have narrowed
the
crash down to this call:
g = OpenPrinterDialog(app.pageSetup)
This is supposed to open the OS printer selection box where he can
choose which printer to use, how many copies to print, etc.
app.pageSetup is a printerSetup object that is setup like this:
app.pageSetup.setupString = pageSetupPref
where pageSetupPref is a string read out of my database (it is stored
in the database in a base64encoded format to avoid binary gunk in the
string wreaking havoc with stuff on windows - historically in RB apps
this has been a problem)
As I said above, this approach works fantastically well for my other
several thousand users - just not for this one. How can I narrow
down
what is causing the problem?
Here is what I have tried:
Change the call to be g = OpenPrinterDialog(new PrinterSetup) - still
crashes (this eliminates the possibility that the string is being
corrupted by being stored in the database)
Uninstall all printers, then install just a pdf printer - still
crashes
Cleaned up registry entries related to printing, spooling, or old
printer software - still crashes
Dug around in the windows event viewer looking for information -
nothing to be found there.
Mahalo & Aloha,
Sam Rowlands
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