Using a tool with an output file

[HaydenWarren]

I am using a tool with an output aprx file. The tool runs fine and has no issues, however when I look for the output file in the selected folder the output file never appears anywhere to be opened? Any suggestion? Have tried nearly everything I know, i.e. saving in different folder, creating a new folder, etc. Thanks, hayden 

[DanPatterson]

Info on you tool parameters would be useful.  From

ArcGISProject—ArcGIS Pro | Documentation

there is the Note to indicate whether the output file can be saved

Projects can be referenced multiple times but only the first reference can be saved directly because the other references will be opened as read-only. The ArcGISProject object has an isReadOnly property that can be used to determine a project's read state before calling a method such as saveACopy instead of save.