# First build attempt error: "Command PhaseScriptExecution failed" **URL:** \ **Category:** macOS\ **Created:** [16 March 2021 18:40 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346 "2021-03-16T18:40:03Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![Nonlinear](https://avatars.discourse-cdn.com/v4/letter/n/ad7895/32.png) [@Nonlinear](https://iplug2.discourse.group/u/Nonlinear)\ **Post date:** [16 March 2021 18:40 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/1 "2021-03-16T18:40:03Z")
Often times on the first attempt to build my plugins, Xcode gives an error: “_Command PhaseScriptExecution failed with a nonzero exit code_” that has something to do with Python script not finding something. Example: ```auto File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plistlib.py", line 406, in parse parser.ParseFile(fileobj) xml.parsers.expat.ExpatError: no element found: line 1, column 0 Command PhaseScriptExecution failed with a nonzero exit code ``` If I immediately click on Build a second time the project builds perfectly without any further errors. Any idea what is causing that? Why does it fail the first time but then succeed immediately afterwards? Anyone else experienced this? ---
**Author:** ![Ric](https://avatars.discourse-cdn.com/v4/letter/r/c77e96/32.png) [@Ric](https://iplug2.discourse.group/u/Ric)\ **Post date:** [17 March 2021 19:31 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/2 "2021-03-17T19:31:06Z")
l’m using Xcode and l haven’t come across this error yet… maybe you need to upgrade Python? ---
**Author:** ![Nonlinear](https://avatars.discourse-cdn.com/v4/letter/n/ad7895/32.png) [@Nonlinear](https://iplug2.discourse.group/u/Nonlinear)\ **Post date:** [17 March 2021 20:31 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/3 "2021-03-17T20:31:17Z")
> [@Ric](#): > > maybe you need to upgrade Python? Maybe, but I thought Python was part of Xcode/Mac OS? ---
**Author:** ![Ric](https://avatars.discourse-cdn.com/v4/letter/r/c77e96/32.png) [@Ric](https://iplug2.discourse.group/u/Ric)\ **Post date:** [18 March 2021 02:02 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/4 "2021-03-18T02:02:47Z")
Mmm… l can’t remember that… at least I can tell you I’m using version 3.9 by now but I had to install it myself… ---
**Author:** ![Nonlinear](https://avatars.discourse-cdn.com/v4/letter/n/ad7895/32.png) [@Nonlinear](https://iplug2.discourse.group/u/Nonlinear)\ **Post date:** [18 March 2021 16:38 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/5 "2021-03-18T16:38:44Z")
AFAIK, iPlug1/2 requires Python 2.7 specifically. If you loaded 3.9 yourself iPlug is probably using the 2.7 version that is still on your system. I have removed and re-installed Xcode. We’ll see if that made any difference. ---
**Author:** ![Ric](https://avatars.discourse-cdn.com/v4/letter/r/c77e96/32.png) [@Ric](https://iplug2.discourse.group/u/Ric)\ **Post date:** [18 March 2021 17:40 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/6 "2021-03-18T17:40:33Z")
Oh l see… anyway, if it works fine after you build a second time then l suppose you can live with it… there’s always minor nuisances with Apple ---
**Author:** ![Nonlinear](https://avatars.discourse-cdn.com/v4/letter/n/ad7895/32.png) [@Nonlinear](https://iplug2.discourse.group/u/Nonlinear)\ **Post date:** [18 March 2021 19:50 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/7 "2021-03-18T19:50:47Z")
I removed and re-installed Xcode 11 but I’m still getting this issue even with the iPlugControls example straight from the iPlug2 package. The error keeps coming up due to the script **prepare\_resource-mac.py** Here’s a complete error message from iPlugControls: PhaseScriptExecution Run\ Script\ -\ prepare\_resources-mac.py /Users/MyMac/Library/Developer/Xcode/DerivedData/IPlugControls-macOS-gzjmmkwfycmqekfztnogcxyiffmq/Build/Intermediates.noindex/IPlugControls-macOS.build/Release/VST2.build/Script-4FBCC1B31FD5AE9F00EFE550.sh (in target ‘VST2’ from project ‘IPlugControls-macOS’) cd /Users/MyMac/Documents/iPlug2/Examples/IPlugControls/projects /bin/sh -c /Users/MyMac/Library/Developer/Xcode/DerivedData/IPlugControls-macOS-gzjmmkwfycmqekfztnogcxyiffmq/Build/Intermediates.noindex/IPlugControls-macOS.build/Release/VST2.build/Script-4FBCC1B31FD5AE9F00EFE550.sh Copying resources … copying slider-handle.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying knob-rotate.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying slider-track.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying slider-track@2x.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying hslider-track.svg to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying switch@2x.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying hslider-handle.svg to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying slider-track.svg to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying font@2x.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying slider-handle@2x.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying knob.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying slider-handle.svg to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying knob@2x.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying font.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying vector-knob.svg to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying switch.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying button@2x.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying knob-rotate@2x.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying button.png to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying Roboto-Regular.ttf to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying fontaudio.ttf to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources copying forkawesome-webfont.ttf to /Library/Audio/Plug-Ins/VST/IPlugControls.vst/Contents/Resources Processing Info.plist files… Traceback (most recent call last): File “…/scripts/prepare\_resources-mac.py”, line 209, in main() File “…/scripts/prepare\_resources-mac.py”, line 60, in main vst3 = plistlib.readPlist(plistpath) File “/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plistlib.py”, line 78, in readPlist rootObject = p.parse(pathOrFile) File “/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plistlib.py”, line 406, in parse parser.ParseFile(fileobj) xml.parsers.expat.ExpatError: no element found: line 1, column 0 Command PhaseScriptExecution failed with a nonzero exit code ---
**Author:** ![Nonlinear](https://avatars.discourse-cdn.com/v4/letter/n/ad7895/32.png) [@Nonlinear](https://iplug2.discourse.group/u/Nonlinear)\ **Post date:** [21 March 2021 17:12 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/8 "2021-03-21T17:12:21Z")
SOLVED - the problem was that I had Xcode Advanced project settings “Build Location” set to “Xcode Default”. I changed that setting to “Legacy” and the problem does not occur. (In iPlug1 I had to use the opposite - Xcode Default - for some reason, _Legacy_ caused issues). Perhaps this could be posted as an FYI sticky? ---
**Author:** ![olilarkin](https://yyz2.discourse-cdn.com/free1/user_avatar/iplug2.discourse.group/olilarkin/32/2_2.png) [@olilarkin](https://iplug2.discourse.group/u/olilarkin)\ **Post date:** [21 March 2021 18:49 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/9 "2021-03-21T18:49:05Z")
> [@Nonlinear](#): > > Xcode Advanced project settings Not sure which settings you are referring to, when I figure it out I can add something. ---
**Author:** ![Nonlinear](https://avatars.discourse-cdn.com/v4/letter/n/ad7895/32.png) [@Nonlinear](https://iplug2.discourse.group/u/Nonlinear)\ **Post date:** [21 March 2021 18:56 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/10 "2021-03-21T18:56:41Z")
File-\>Project Settings-\>Advanced ---
**Author:** ![olilarkin](https://yyz2.discourse-cdn.com/free1/user_avatar/iplug2.discourse.group/olilarkin/32/2_2.png) [@olilarkin](https://iplug2.discourse.group/u/olilarkin)\ **Post date:** [21 March 2021 19:05 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/11 "2021-03-21T19:05:10Z")
OK, i open the workspace so didn’t see it. So did you change something here after cloning an IPlug2 project ? ---
**Author:** ![Nonlinear](https://avatars.discourse-cdn.com/v4/letter/n/ad7895/32.png) [@Nonlinear](https://iplug2.discourse.group/u/Nonlinear)\ **Post date:** [21 March 2021 19:07 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/12 "2021-03-21T19:07:54Z")
> [@olilarkin](#): > > did you change something here after cloning an IPlug2 project No, it’s the main toolbar of Xcode. File-\>Project Settings-\>Per User Project Settings-\>Advanced ---
**Author:** ![AlexHarker](https://avatars.discourse-cdn.com/v4/letter/a/9de053/32.png) [@AlexHarker](https://iplug2.discourse.group/u/AlexHarker)\ **Post date:** [27 March 2021 16:57 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/13 "2021-03-27T16:57:50Z")
This is a setting for all of Xcode. I also regularly see this issue on Xcode 9 - the python often fails. In the past of turned off parallel builds to reduce this error, but would be good if we could fix it. ---
**Author:** ![ette](https://avatars.discourse-cdn.com/v4/letter/e/898d66/32.png) [@ette](https://iplug2.discourse.group/u/ette)\ **Post date:** [5 February 2024 11:06 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/14 "2024-02-05T11:06:07Z")
Hallo everybody, Ihm still new here and with iplug2. Ive followed the Hints on 01\_Getting\_started\_mac\_ios but when I try to build, I got an error “Command PhaseScriptExecution failed with a nonzero exit code” “plistlib.InvalidFileException: Invalid file” Working an MacOS 12.7.3 and Xcode 14.2 What´s wrong? Ette ---
**Author:** ![RexMartin2](https://avatars.discourse-cdn.com/v4/letter/r/da6949/32.png) [@RexMartin2](https://iplug2.discourse.group/u/RexMartin2)\ **Post date:** [5 February 2024 16:52 UTC](https://iplug2.discourse.group/t/first-build-attempt-error-command-phasescriptexecution-failed/346/15 "2024-02-05T16:52:13Z")
> [@ette](#): > > when I try to build, I got an error “Command PhaseScriptExecution failed with a nonzero exit code” The problem is with the plist files. If you have already built the plugin once before sometimes the existing plist files in those builds prevents writing new ones when you try to compile again. Go to wherever your plugin files are being created (Pro Tools Plugins folder, Plugins components folder, etc.) and DELETE the previously plugin(s) from the previous build. Also make sure to “Clean” your Xcode project between builds.