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Unknown command line argument : '--reference=/' after Visual Studio Update
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Wong Wei Loon
11
Reputation points
I working on project in Windows 10, paring to Macbook for building iOS project, and it's works as expected.
Today I just updated the Visual Studio in Windows and also Visual Studio for Mac and I encountered bunch of errors with Unknown command line argument : '--reference=/'. There is no clue about what to do, does anyone have any ideas ?
Windows
Microsoft Visual Studio Enterprise 2019 - Version 16.11.10
Xamarin.iOS and Xamarin.Mac SDK - 15.2.0.17
Xamarin Android SDK - 12.0.0.3
Mac
Visual Studio for Mac - Version 8.10.19 (build 2)
Xamarin iOS - Version 13.18.1.31
Xamarin Mac - Version 8.6.0.3
XCode - Version 13.2.1
Operating System - Mac OS X 11.3.0
Developer technologies .NET Xamarin
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 3%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWZ%3C/text%3E%3C/svg%3E)
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff2022-03-02T03:15:22.013+00:00 First, you could check if the file in
/user/xx/Library/Caches/Xamarin/mtbs/builds/xxx.iOSexists, after updating VS and Xcode, the files under Caches folder may not exist.
Second, try to clean thebin/obj,.vsfolder of your project on Windows and clean solution in VS. Then you could reopen VS, pair to Mac and build again.
Finally, you could try to updateXamarin.iOSframework on Mac, the latest version is 15.6.03, and upgrade VS2019 to VS2022.In addition, may I ask if this issue still exist when building your project directly on the mac?
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