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What causes a 'Transfer error: negative UMAS response' when using the Unity Loader to transfer a project to an M340 PLC?

Published date: 21 October 2019

This error means that the M340 project was last Built with Control Expert (formerly Unity Pro) in Simulation Mode rather than Standard Mode. Open the M340 project with Control Expert and Rebuild the project in Standard Mode.


Legacy KB System (APS) Data: RESL192036 V1.0, Originally authored by DaSo on 05/28/2008, Last Edited by DaSo on 05/28/2008
Related ranges: Unity Pro

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