This error is produced by the OLD EFI toolkit.
It results because the current working directory is not set.  The ASSERT is 
triggered specifically because CWD does not contain a ':'.

Within either the EFI or UEFI shells, CWD is not set until after the first time 
one explicitly sets it.  For example, the initial prompt from the Shell is 
"Shell> ".  If you see this prompt, there is NO CWD.  If you then switch to one 
of the mapped drives, say fs0, then CWD will be set for that volume.  Example:

Shell> fs0:
fs0:\>

After the above sequence, the CWD will be the root, "\", of volume "fs0".

Daryl McDaniel

"I have always wished for my computer to be as easy to use as my telephone;
my wish has come true because I can no longer figure out how to use my 
telephone."
-- Bjarne Stoustrup


From: ritul guru (riguru) [mailto:rig...@cisco.com]
Sent: Monday, July 01, 2013 10:58 PM
To: Toto Lebolo; edk2-devel@lists.sourceforge.net
Subject: Re: [edk2] assertion "tmp != NULL" failed: file "sys\open.c", line 171

+1,
I have also seen this issue, when I was using open() function of libc in one of 
the efi application.
But I couldn't find the reason behind this.


Regards,
Ritul
From: Toto Lebolo [mailto:toto_leb...@yahoo.com]
Sent: Tuesday, July 02, 2013 4:35 AM
To: edk2-devel@lists.sourceforge.net
Subject: [edk2] assertion "tmp != NULL" failed: file "sys\open.c", line 171

I am getting this error message in the shell when invoking the python 
interpreter or when launching the ftp command.
I don't know why I am getting this error message. I remember that Python was 
running fine few months ago.
I cannot find what is causing this error.
Does anybody experience this issue?

The error message: "assertion "tmp != NULL" failed: file "sys\open.c", line 171"

Thanks for the help.
MiKL~
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