Command "uxext" in "replace" mode fails when repeated several times in the same output file

Document ID : KB000085333
Last Modified Date : 14/04/2018
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Error Message :
The error msg is always the same, on all OS:

Error in zipping file.
Command uxext in error.

Patch level detected:Dollar Universe 6.0.00
Product Version: Dollar.Universe 6.0.0

Description :Issue occurs when extracting a single object or multiple objects in replace mode in the same output file.

the extraction command :
./uxext upr upr=TESTEXT EXP output=/tmp/uxext_upr_TESTEXT.txt repl

it works fine several times
then it fails with the followin error msg :

Object (Uproc, TESTEXT, 000) has been replaced.
Error in zipping file.
Command uxext in error.
OS: All
Cause type:
Root Cause: N/A
Update to the fix version listed below or a newer version if available.

Fix Status: Released

Fix Version(s):
Component: Application.Server
Version: Dollar.Universe 6.8.01
Additional Information:
Workaround :