I am using Epic 4.3.1 I'm re compiling SGML DTD's with dtgen.exe on Windows 2000 I get the following messages : Dtgen Application Error : On line NN in file SOMEFILE : Parse ATI Tags -- Expected "tag:" token. Got "xmlns:". Compile failed - rc=64 note : SOMEFILE is a .dtd file, that is calling a main entity file, which is calling some other entities. The main .dtd file was not changed since last time I succeded in compiling, but one of the called entity file was modified Thank's to anybody able to give me some tips