Hi, Does anyone know how to create a user class for the HCONST memory type using the c251 compiler similar to creating one for the ECODE memory type: #pragma userclass (ucode = foo). The above would create the user class ECODE_FOO I want to do this: #pragma userclass (hconst = foo) to create the user class HCONST_FOO so I can position the constants in the file foo.c in an absolute memory address range at link time. However, hconst does not seem to be a memory type that the C251 compiler can assign a user class to. Any help would be greatly appreciated. Thanks, Trevor.