Hi All! I'm new to this list, but have been using a couple of forms of C on the AS/400 (System C, C/400 ILC/C) for many years. We chaged to OS 5.2 some weeks ago and I've run into trouble since that. I've got a C program compiled and linked with *TERASPACE and after the OS change I get an error message when calling an external CL program; MCH0607 Unsupported space used. I've tried to declade the function calling the CL program with #pragma datamodel(LLP64), but with the same error message. Any hints for this? I've made no other changes in the system than recompiling after the OS change. /Joakim Cap Gemini Ernst & Young, Technology Services Svensson, Joakim Certified Enterprise Architect Järnvägsgatan 14 <http://maps.yahoo.com/py/maps.py?Pyt=Tmap&addr=251+06+Helsingborg&csz=Swede n&country=us> 251 06 Helsingborg Sweden Joakim.Svensson@xxxxxxxx <mailto:Joakim.Svensson@xxxxxxxx> tel: +46 8 5368 3934 <http://www.plaxo.com/signature/> Powered by Plaxo <http://www.plaxo.com/signature/> Want a signature like this? This message contains information that may be privileged or confidential and is the property of the Cap Gemini Ernst & Young Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.