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CPI error when upgrading the Windows tile on Pivotal Cloud Foundry

Environment

Pivotal Cloud Foundry 1.11

Symptom

When upgrading your Windows tile on Pivotal Cloud Foundry, you see the following CPI error:

Started creating missing vms Started creating missing vms > windows_diego_cell/05e88ac0-ef5f-495a-8d7c-c17f1a95ebe9 (0) 
Started creating missing vms > windows_diego_cell/12db874b-f706-47ae-aa69-fc319b9fc5aa (8)
Started creating missing vms > windows_diego_cell/d04b9d17-789d-4c88-8cca-2c04cf324b5b (4)
Failed creating missing vms > windows_diego_cell/05e88ac0-ef5f-495a-8d7c-c17f1a95ebe9 (0):
Unknown CPI error 'Unknown' with message 'Incompatible device backing specified for device '13'.' in 'create_vm' CPI method (00:00:58) Failed
creating missing vms > windows_diego_cell/d04b9d17-789d-4c88-8cca-2c04cf324b5b (4):
Unknown CPI error 'Unknown' with message 'Incompatible device backing specified for device '13'.' in 'create_vm' CPI method (00:00:58) Failed
creating missing vms > windows_diego_cell/12db874b-f706-47ae-aa69-fc319b9fc5aa (8):
Unknown CPI error 'Unknown' with message 'Incompatible device backing specified for device '13'.' in 'create_vm' CPI method (00:00:58)

Cause

One of the reasons for this error could be that the templates had been changed in someway. Although, this error could also occur due to configuration issues as well. 

Resolution

This is a known issue for which we have a workaround. You can kill off the tile with the issue and reinstall it with the Pivotal Cloud Foundry 1.11 upgrade.

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