ACS-MigrationApplication-2.6.0.903 Reports ISE 2.6 version is not supported

[gregflowers]

ACS to ISE migration tool ver 2.6.093 will not import ACS data to ISE version 2.6.0.156. Reports "This ISE version is not supported."

[Damien Miller]

Have you confirmed the ACS version you are on is supported by the tool? There are specific ACS release and patch requirements for the migration tool.   
https://www.cisco.com/c/en/us/td/docs/security/ise/2-6/migration_guide/b_acs_ise_migration_ug_26/b_acs_ise_migration_ug_26_chapter_0101.html

"Migrate from Cisco Secure ACS, Release 3.x

If you are running Cisco Secure ACS, Release 3.x in your environment, upgrade to a migration-supported version of Cisco Secure ACS, Release 4.x.

Procedure

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Step 1	Check the upgrade path for Cisco Secure ACS, Release 3.x, as described in the Installation Guide for Cisco Secure ACS Solution Engine 4.2.
Step 2	Upgrade your Cisco Secure ACS, Release 3.x server to a migration-supported version of the Cisco Secure ACS, Release 4.x. For example, upgrade to one of the following Cisco Secure ACS 4.2.0.124, or Cisco Secure ACS 4.2.1 releases.
Step 3	After the upgrade, follow the steps that describe migrating from Cisco Secure ACS, Release 4.x .

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Migrate from Cisco Secure ACS, Release 4.x

If you are not running one of the migration-supported versions of Cisco Secure ACS, Release 4.x in your environment, upgrade to a point where you can migrate from Cisco Secure ACS, Release 4.x to Cisco Secure ACS, Release 4.2.

Migrate from Cisco Secure ACS, Release 5.x

If you are running Cisco Secure ACS, Release 5.x in your environment, you must upgrade to Cisco Secure ACS, Release 5.5 or above.

To migrate internal users from Cisco Secure ACS 5.x to Cisco ISE, you must install Cisco Secure ACS 5.5 Patch 4 or later, ACS 5.6, ACS 5.7 Patch 1 or later, or ACS 5.8, and then start the migration."

[gregflowers]

The export from ACS completed correctly.

We are running ACS 5.8, which is supported by this tool.

[Damien Miller]

Ok well that's half the challenge, so that's good. Next questions;

1. Does the target ISE Deployment have patch 3 installed?
2. Is the CLI migration option enabled on the primary admin node? application configure ise > option 11 enable.