iOS recently was updated so that the custom function to detect whether FileMaker Go was running under the Native App or SDK no longer functions.
Since we're no longer able to detect this, GoZync versions 5.08-5.12 will not be able to update the mobile file without making the following change:
The fix requires updating the IsNativeApp custom function. Modifying custom functions requires FileMaker Pro Advanced. If you don't have access to Advanced, feel free to reach out and we'll be glad to make the change for you.
When using GoZync as normal, replace the entire calculation of the IsNativeApp custom function to return 0. Nothing else, just 0
If you are running the SDK to test GoZync, you'll need to update the Custom Function to return 1.