Frequent disconnection in the latest version of MGP / Metaserver

Support & Troubleshooting
1

1. Summary/Title
Frequent disconnection in the latest version of MGP / Metaserver.

After wrapping up a project, I thought I’ll update my MGP & Metaserver to the latest version to check the new features out. But MGP consistently and persistently crashes every few minutes.

2. Steps to Reproduce

  • Step 1: Open Metaserver (target app doesn’t matter)
  • Step 2: Wait for a few minutes

3. Expected Result
MGP stays open and stable.

4. Actual Result
MGP crashes.

6. Device Information

  • Operating System (OS version): MacOS Sequoia 15.7.5 (24G624)
  • MetaGrid Pro version: 1.7.3 (Build 35821) / Metaserver 6.1.3 (Build 4335)
  • **Device Model : iPad Pro (6thGen), Mac Studio (M4 Max)
  • Affected software version (e.g., Cubase 15.0.30):

7. Additional Notes
I can see some Errors and Warnings in the Metaserver logs.

Time Level Category Message
26-08-28 20:37:55.228 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 0 (Metasystem - MIDI - In ): OSStatus=-50
26-08-28 20:37:55.228 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn0: OSStatus=-50
26-08-28 20:37:55.229 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 1 (Metasystem - Cubase - In): OSStatus=-50
26-08-28 20:37:55.229 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn1: OSStatus=-50
26-08-28 20:37:55.230 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 3 (Metasystem - Logic - In): OSStatus=-50
26-08-28 20:37:55.230 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn3: OSStatus=-50
26-08-28 20:37:55.231 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 7 (Metasystem - Cubase Sync - In): OSStatus=-50
26-08-28 20:37:55.231 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn7: OSStatus=-50
26-08-28 20:37:55.232 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 9 (Metasystem - Cubase 2 - In): OSStatus=-50
26-08-28 20:37:55.232 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn9: OSStatus=-50
26-08-28 20:37:55.233 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 10 (Metasystem - Cubase 3 - In): OSStatus=-50
26-08-28 20:37:55.233 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn10: OSStatus=-50
26-08-28 20:37:55.234 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 11 (Metasystem - Cubase 4 - In): OSStatus=-50
26-08-28 20:37:55.234 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn11: OSStatus=-50
26-08-28 20:37:55.235 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 12 (Metasystem - Cubase 5 - In): OSStatus=-50
26-08-28 20:37:55.235 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn12: OSStatus=-50
26-08-28 20:37:55.236 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 13 (Metasystem - Cubase 6 - In): OSStatus=-50
26-08-28 20:37:55.236 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn13: OSStatus=-50
26-08-28 20:37:55.238 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 14 (Metasystem - Cubase 7 - In): OSStatus=-50
26-08-28 20:37:55.238 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn14: OSStatus=-50
26-08-28 20:37:55.239 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 15 (Metasystem - Cubase 8 - In): OSStatus=-50
26-08-28 20:37:55.239 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn15: OSStatus=-50
26-08-28 20:37:55.240 E MIDI [midi-port] FAILED MIDIPortConnectSource for port 16 (Metasystem - Cubase 9 - In): OSStatus=-50
26-08-28 20:37:55.240 W MIDI [midi-port] FAILED MIDIObjectSetIntegerProperty(uniqueID=0) for midiPortIn16: OSStatus=-50
26-08-28 20:37:55.251 W Application Notification permission not granted
26-08-28 20:44:22.985 E Application Error getting Keyboard Maestro macro list @@Can’t get application Keyboard Maestro Engine.app.
26-08-28 20:44:23.007 W Application IntegrationsDirectoryViewController: Keyboard Maestro AllMacrosString returned nil
26-08-28 20:44:51.552 E Application Error getting Keyboard Maestro macro list @@Can’t get application Keyboard Maestro Engine.app.
26-08-28 20:44:51.552 W Application IntegrationsDirectoryViewController: Keyboard Maestro AllMacrosString returned nil
26-08-28 20:46:13.745 W Application AXObserver notification registration failed: AXTitleChanged (error -25204)
26-08-28 20:46:13.745 W Application AXObserver notification registration failed: AXFocusedWindowChanged (error -25204)
2

Thanks for the detailed report. A reply has also been sent to your email with the recommended troubleshooting steps.

Please first create a backup of your MetaGrid Pro content. Then remove MetaGrid Pro completely from the iPad, reinstall it from the App Store, and restore your content from the backup.

This will replace the application installation and clear potentially corrupted cached state while preserving your grids and other content. Please let us know whether the crashes or disconnections continue after the clean installation.