Error during build: Unable to create patch database

[Edhy]

Hi

I am trying to build a patch file and added a Patch Reference file which is my project's previous version created with IA (using same IA version)

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Error during build: Unable to create patch database [TargetImages.MsiPath 'e:\\vpme9apps\\ezcalltrack\\iaprojects\\ezcalltrack-setup\\Patch\\Base Package 1\\data\\ezCallTrack-Setup.msi' is not a proper MSI.]

I am getting above error and don't know what may be wrong here, since the patch reference file was created with IA using the Build Compress Single File option.

Thanks!