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Unified Comfort Panel - Script sync not wait catch error result

Created by: gigiA at: 11/27/2023 2:28 PM (1 Replies)

11/27/2023 2:28 PM	Rate (0)
gigiA Regular Member Joined: 11/6/2020 Last visit: 1/10/2025 Posts: 10 Rating: (0)	hi to all. I don't undestand why the syncr scrip doesn't wait for the catch error of a reading file (if the file doesn't exist) but the code immediately moves over, look at the image please. This script is a global script. Even if the file exists the timeline is identical. ...it is like the end of job about FileSystem work was not wait.. Is there a way to know when HMIRuntime.FileSystem finishes it job? Thanks for your support. gigiA here the script code export function fzTest_1() { HMIRuntime.Trace("1_MyDebug"); HMIRuntime.Trace("2__MyDebug"); HMIRuntime.FileSystem.ReadFile("/media/simatic/X51/fileABC.txt2" , "utf8") .then(function(data) { HMIRuntime.Trace("3a__MyDebug_ File OK"); }) .catch(function(errorCode) { HMIRuntime.Trace("3a__MyDebug_ File NOK " + errorCode ); }); HMIRuntime.Trace("4__MyDebug"); HMIRuntime.Trace("5__MyDebug"); } Attachment trace.png (266 Downloads)

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11/27/2023 7:32 PM	Rate (0)
Stefan Arcularius Platinum Expert Joined: 1/21/2013 Last visit: 1/15/2025 Posts: 3431 Rating: (539)	Hi gigiA, The ReadFile method is an asynchronous operation that returns a Promise object. Therefore, it is desirable behavior to continue code execution even if the Promise is not set. If you really want to wait, you can set an await statement before the ReadFile call. A completed read operation is handled by the than handler, while an erroneous execution is handled by the catch handler. Kind regards Stefan

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