Customers using Virtuoso IC23.1 and later are encountering a fatal error “ERROR: Invalid OA version specified in the MGC_FDI_OA_VERSION environment variable” during the Calibre View generation process. Moving to a version later than 2024.1_28 and manually set the environment variable "MGC_FDI_OA_VERSION" to "22.60" would solve this issue.
This issue arises from the automatic detection of the OA version. Virtuoso IC23.1 sets the OA version to 22.61 by default, whereas the latest supported OA version is 22.60.
In order to overcome this issue, you will need to move to a version later than 2024.1_28 and manually set the environment variable "MGC_FDI_OA_VERSION" to "22.60".
Starting from Calibre v2024.4 or later, the environment variable MGC_FDI_OA_VERSION will be automatically set to 22.60, and a warning message will be issued indicating a different OA version is set.