interesting error

[tan125]

Last night during our nightly build, VBP threw an error while calling another .bld file

(logfile says: 5/27/2008 5:52:27 PM: Building project step 'Call Copy to Help Server'...
Process completed with exit code 1
5/27/2008 5:53:34 PM: Step 'Call Copy to Help Server' failed
5/27/2008 5:53:34 PM: Building failure step 'Send Error Notification'...).

About an hour later, I noticed the error, and went to start manually the .bld file which threw the error when called, when I noticed that despite the error on the call step, the called .bld file had opened and run anyway! Have you seen this before? I'm running v6.7.