Hi, I have to switch the IDE to Codesys version 3.5.17. Unfortunately I have been in troubles with opening project saved in version 3.5.16 - there are missing Symbols, Visualization and Visualization Manager in Application. The 3.5.17 is trying to explain me during the project opening that I have to do "save as.." the project in older Codesys version using format 3.5.17 - but there isn't that option.