Thank you for the reply. I checked the link and the file mem.h.

Although these two macros, C_P_M1(c,t) and C_P_M2(c,t), weren’t in the link of the UDF manual, however, they existed in the “mem.h” file (see the attached pictures).

So, the question still exists. What happened to these two macros? Why have they not been mentioned in the UDF manual?

Can we still use them? If we can, why I encountered an error using, particularly, this C_P_M2(c,t) macro?


Edit - Rob. Sharing Documentation & screen grabs of headers isn't permitted. Friendly warning, nothing to worry about. Links to documentation & section numbers are fine.