Today I was trying to import Contact Entity solution after done some changes in customization.xml and i found below error :
\”Error while Importing a solution in CRM 2011 – The solution file is invalid. The compressed file must contain the following files at its root: solution.xml, customizations.xml, and [Content_Types].xml\”
After spending a huge amount of time checking and rechecking my code, I was finally sure that the issue had to be somewhere else.
Problem Was – I was zipping up the solution folder, this then creates a zip file with a folder at the root and then the three solution files