I appreciate all the feedback. It runs smoothly now, and makes much more sense.
Thanks, Steve "Dave Carrigan" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > > On Wed, Aug 13, 2003 at 05:24:44PM -0700, Steve K wrote: > > In that case, I'm curious what is wrong with this code that runs fine on the > > palm handheld but is rejected by the emulator with the following error on > > line marked with *: > > > > Project (1.0) called SysFatalAlert with the message: "Field.c, Line: 7221, > > NULL parameter". > > > > Is there something wrong with setting fldAttr to NULL before calling > > FldGetAttributes? > > > > void foo() > > { > > // Verify field attributes > > FieldAttrType* fldAttr = NULL; > > FldGetAttributes(fldP, fldAttr); > > I'm actually amazed that it runs fine on the palm handheld. I guess the > handhelds are more forgiving about writing data to memory location > 0. That code is bad bad bad. > > Try > > FieldAttrType fldAttr; > FldGetAttributes(fldP, &fldAttr); > > Or, if you insist on passing a real pointer to FldGetAttributes: > > FieldAttrType* fldAttr; > fldAttr = MemPtrNew(sizeof(FieldAttrType)); > FldGetAttributes(fldP, fldAttr); > ... > MemPtrFree(fldAttr); > > Hint: don't do it this way, but it might give you some insight on what > was wrong with your code. > > Also, find a good book on C that explains pass by reference via pointers > vs. pass by value. > > -- > Dave Carrigan > Seattle, WA, USA > [EMAIL PROTECTED] | http://www.rudedog.org/ | ICQ:161669680 > UNIX-Apache-Perl-Linux-Firewalls-LDAP-C-C++-DNS-PalmOS-PostgreSQL-MySQL > > Dave is currently listening to Questions - Price You Pay (Instrumental) (Price You Pay) > > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
