PBXPROJ file is used by Xcode software application. This file is used as project file for saving the user progress during application development process.
The PBXPROJ file stores all the required data for compiling the code and running it. The users can save the progress of their project in PBXPROJ file which can be used for saving non compiled code. The Xcode software application is used to create application for a number of Apple based platforms and therefore the user preference while working on the project is also stored in the project file. All the data required for compiling the project is stored in PBXPROJ file.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .PBXPROJ file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .PBXPROJ file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .PBXPROJ file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.