Hi, guys, Please see below and how to fix this error? PS C:\Users\Dingjun.Chen> g++ --version g++.exe (MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders) 13.2.0 Copyright (C) 2023 Free Software Foundation, Inc. I did include the following head files in _d_dngl.cc include/c++/13.2.0/cstring /home/Dingjun.Chen/DAQ_XYZCross2_cmake_v5/src/_d_dngl.cc:284:9: error: 'memcpy' was not declared in this scope 284 | memcpy(aRandom1, aDeCrypt1, 8); | ^~~~~~ /home/Dingjun.Chen/DAQ_XYZCross2_cmake_v5/src/_d_dngl.cc:284:9: note: 'memcpy' is defined in header '<cstring>'; did you forget to '#include <cstring>'? I look forward to your help and hearing from you! Thanks & regards, Dingjun Dingjun Chen | Software Developer [Geotech Airborne Geophysical Surveys] Geotech Ltd. dba Geotech Airborne | 270 INDUSTRIAL PKY S | AURORA ON CA | L4G 3T9 T: +1 905 841 5004 | Dingjun.Chen@xxxxxxxxxxxxxxxxxxx<mailto:Dingjun.Chen@xxxxxxxxxxxxxxxxxxx> | www.geotechairborne.com<www.geotech.ca> P Please consider the environment before printing this email This message may contain PRIVILEGED AND PROPRIETARY INFORMATION intended solely for the use of the addressee (s) named above. Any disclosure, distribution, copying, or use of the information by others is strictly prohibited. If you have received this message in error, please advise the sender by immediate reply and delete the original message.