save bodies "above name is invalid"

Recently with my SW2014  SP4 when doing a Save Bodies and then Save As the body/s names I have been receiving the following error dialog "C:\\Program Files\\SolidWorks\\Corp\\SolidWorks2014\\Solidworks\\.asm The above file name is invalid"

Has anyone else experienced this and if so found a solution to it?

thanks

Mark

SolidworksParts And Features