Reference error(92): Unknown type name egm_minmax

Hi, does anyone have any experience with this error using the EGM.
It occurs within the first 5 lines
"MODULE EGM_test
It occurs within the first 5 lines
"MODULE EGM_test
VAR egmident egmID1;
VAR egmident egmID2;
VAR egmstate egmSt1;
CONST egm_minmax egm_minmax_lin1 := [-1,1];"
Any help or advice would be appreciated,
Any help or advice would be appreciated,
Comments
Really simple but I didn't see it in the manuals (not that it isn't there, but there was a lot to read!)