After resolving the "entitlements" problems I was having with "In-House" provisioning profiles, now I have encountered an IPA loading problem with Apple 2 Configurator. The complete error is: "An unexpected error has occurred with . The operation couldn't be completed. Undefined error: 0 [NSPOSIXErrorDomain - 0x0 (0)]. I get this error when I try and load one of the newly compiled apps that have the "In_House" provisioning profile with a new application id with the WiFi entitlements enabled. Strange, but 1 of the 3 IPAs will load and the other 2 cause this error. And it doesn't do it on all iPads. The research I have found relates more to OS X than iOS, so if anyone has had this same problem and fixed it, please let me know. I can compile all 3 apps directly from VS to my iPad. I can also load them all on my iPad, but at our other office, I have run into only being able to load one. They all have different app ids and provisioning profiles. Both macs being use have 10.13.6 and Apple Configurator 2.7.1. I have looked at the device logs and there is nothing in them that shows this error has occurred.