The minimum compatible Versions are Adabas 6.7.1 and Natural 9.1.2, but both NAT912 and NAT913 are out of (basic) support by now so the version to go with is 9.1.4
This information is available from Empower via Products & Documentation → Product version availability.
Use the SAG Installer, also available via Empower, to download and install these versions.
If we are to migrate existing Adabas version 6.2 to 6.7.1, any compatible issue ?
If we are to migrate existing Natural version 6.3.8 to 9.1.4, any compatible issue or do we request to modify coding (example : syntax, display map, dialog….etc) ?
I have never heard of compatibility issues with Adabas, one usually runs the adacvt utility to upgrade the internal structures to the new version and that’s it.
For both products this is a BIG jump in versions, I personally don’t know of anyone having done it directly, so you might want to file an incident with SAG support and ask for experiences and heads-ups.
While you can still use Natural Studio the preferred way is Natural ONE, so there is more to consider than just the upgrade, btw.