Geometry cannot have Z values error when packaging a mobile map

[GWThompson]

So I am having an issue when packaging a mobile map for offline viewing. This is a package that I normally do every week, but just recently I have started getting the Z value error

unfortunately the error message isn't very helpful, and the log doesn't show much either

Through trial and error I narrowed it down to one layer, and checking out the layer it doesn't have Z or M values enabled, yet I am still getting the error

I've tried creating a new feature class and copying records over, tried deleting the last 2 months of new/edited records. I've ran the repair geometry tool which fixed some lines with short sections, and one null geometry, but still did not solve the problem.

Any ideas???

[Miralem_Zeljo]

That is really interesting observation. I will be testing this myself.

[Jeremy_Z]

Not in my case.

[AveryCook2]

I was also having the same error when packaging a project package. None of the layers had Z values or a vertical coordinate system. I was not able to clear the error, but was able to find a work around by selecting the "Upload Package to Online Account" option rather than saving to file. The Project Package tool did not throw an error when packaging and uploading. Then could just download the package from my AGOL account.