After trying to start the run mode, I get a fatal error on the target system :
Init7\IO: Set State TComObj PREOP OP >> AdsWarning: 1861 (0x745, ADS ERROR: timeout elapsed)
Anyone of you know how to fix it?
Is your target system running Windows 10? Has it recently been updated (Windows Update) to version 1803? If so, the problem is because TwinCAT is not compatible with the 1803-version of W10. Beckhoff did release an updated TwinCAT version 3.1.4022.20, but removed it as it caused other problems. They will release a new version in the coming days.