I have a Google App Engine project imported in Eclipse. For some reason when I go to Eclipse project properties the Google App Engine SDK seems to be saved as the location of the jar (appengine-api-1.0-sdk-1.4.0.jar) instead of the location where the actual SDK is. If I modify the settings of the project to use the correct SDK, the new setting is not saved. Because I can't modify the setting I can't deploy my application from inside Eclipse anymore.
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Was it a maven gae project? If so, I was able to 'unstick' the sdk location by moving maven dependencies on the bottom of my project build path. As mentioned in here http://googlewebtoolkit.blogspot.com/2010/08/how-to-use-google-plugin-for-eclipse.html
"Under Java Build Path, select the Order and Export tab and move all Maven dependencies to the BOTTOM. Otherwise, GPE will see the App Engine and GWT SDKs from the Maven repo on the build path and complain that they are not valid. This is because GPE expects a specific SDK structure used to enable other tooling."
francisnovilla
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Indeed it was a maven gae project. Moving the dependencies worked. – Pava Apr 07 '11 at 05:49
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1Great, thank you! Strangely, it is now 2014 and I still can't save the location of the actual SDK in the buggy settings window. – Deleplace Jan 17 '14 at 14:05
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@Ripounet 2016 and the issue is still there – Tahir Akhtar Jan 01 '16 at 17:49
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Mine was not a maven project, but indeed reordering the exports worked. In particular I had to move the app engine SDK jar to the top of the export list.
user1978019
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This worked for me. I also was not using Maven and had this issue. – Duncan Calvert Jun 11 '14 at 04:22
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Your app engine sdk version is not the same as the app engine sdk that is imported in the project, download the correct version and the configure it
Dev
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