RHCL commandline HTML Compiler - invalid project

[Krischu]

When I run a script (batch skript) that invokes RHCL, I'm getting this:

Adobe(R) RoboHelp Project Command Line Compiler Version 12.0.0.306
Copyright (C) 2006-2007, Adobe Systems Incorporated und Lizenzgeber. Alle Rechte vorbehalten.
Fehler: Ungültiges Projekt für RHCL. Stellen Sie das Projekt mit RoboHelp wieder her.

@echo on
@set rhclexe="c:\Program Files (x86)\Adobe\Adobe RoboHelp 2015\RoboHTML\rhcl"
@set p=h:\Robohelp-Projekte-deutsch\Version_V6.5-d\product1
del /q temp\*.*
@rem del /s *.cpd
@rem del /s *.chm
@echo Starte Compilation product1
@%rhclexe% %p%\product1\product1.hhp -o temp >>temp\log.txt

I tried the .xpj file extension before to no avail also. I also opened the project using RH12 (RoboHelp 2015) and closed it again. No effect.

[Krischu · Accepted solution]

I have no idea what initially was the problem, but after deleting all .xpj files and interactively opening all projects through their .hhp files in RH2015 (RH12) I was able to use the newly generated .xpj files on the command line of the RHCL.EXE.