Depending on the LMOS version running on the LoadMaster you are updating, you may need to supply one of the XML verification files when upgrading. See the notes for your release below.

Currently Running Version Update Notes
7.2.51 or later

Verification of the digital signature on update images is required by default. See the Update Verification Options setting under System Administration > Miscellaneous Options > WUI Settings. If the unit you are updating is set to require validation, you must upload the following XML Verification file supplied with this release during the update process:

7.2.48.3.19710.RELEASE.PATCH-64-MULTICORE.checksum.xml

After the update, any capabilities specific to 7.2.51 will no longer be available on LoadMaster.
7.2.50

Same as above, except a different XML file supplied with this release must be uploaded during the update process:

7.2.48.3.19710.RELEASE.PATCH-64-MULTICORE-pre7.2.51.0.checksum.xml

After the update, any capabilities specific to 7.2.50 will no longer be available on LoadMaster.
7.2.49.1

Online verification not supported. You can verify the digital signature using a Verifying XML Signatures Technical Note using the same verification file as shown above for 7.2.50.

After the update, any capabilities specific to 7.2.49.1 will no longer be available on LoadMaster.
7.2.48.2 or earlier Online verification not supported. You can verify the digital signature using a Verifying XML Signatures Technical Note using the same verification file as shown above for 7.2.50.

If you are currently running LMOS 7.1.x or an earlier version, please see the Updating the LoadMaster Software Technical Note for full upgrade path information.