I am doing a project on twincat 2.11 with CX-1020 controller which doesnt support Twincat 3. I can connect the PC to PLC and also able to upload the system configuration from the controller but the programm which is present in the controller is not accessible.I tried to to upload the program from target PLC to PC but it is showing an error that the 'Runtime is already in use' or 'source file could not be read'.The runtime port 801 is also selected in the PLC control setting but still the error is comming.I also added the multiple runtime ports but its not showing while uploading.Kindly provide me the solution for this.
