Can't get starter code to compile

[Fawcett, Mitch]

I cut and pasted the starter project code for checking ROM version and I get
an error when I compile.  When I comment out the code I get a clean compile.

Here's the error:  "In function 'RomVersionCompatible'  line:137 'err'
undeclared"

What's 'err'??  I'm confused.

( line 137 in my case is the one that starts with AppLaunchWithCommand...)

Here is what I pasted:

static Err RomVersionCompatible(DWord requiredVersion, Word launchFlags)
{
        DWord romVersion;

        // See if we're on in minimum required version of the ROM or later.
        FtrGet(sysFtrCreator, sysFtrNumROMVersion, &romVersion);
        if (romVersion < requiredVersion)
                {
                if ((launchFlags & (sysAppLaunchFlagNewGlobals |
sysAppLaunchFlagUIApp)) ==
                        (sysAppLaunchFlagNewGlobals |
sysAppLaunchFlagUIApp))
                        {
                        FrmAlert (RomIncompatibleAlert);
                
                        // Pilot 1.0 will continuously relaunch this app
unless we switch to 
                        // another safe one.
                        if (romVersion <
sysMakeROMVersion(2,0,0,sysROMStageRelease,0))
// the next line is where the compiler says there's an error...
                                AppLaunchWithCommand(sysFileCDefaultApp,
sysAppLaunchCmdNormalLaunch, NULL);
                        }
                
                return (sysErrRomIncompatible);
                }

        return (0);
}