It looks like you're referring to with a specific version number — 1.26 — and the word "tatah" (possibly a typo or name of a patch source/mod group) plus "patched" .
The 1.26a patch is essential for running the classic W3Arena client, which provides high-level ladder matchmaking and low-latency servers. Replay Compatibility: warcraft iii the frozen throne 126 tatah patched
The modification typically included:
This update focuses on modernizing the experience for players on private servers and enthusiasts who prefer the classic engine over the Reforged version. Here is everything you need to know about the 1.26 Tatah patched version. What is the 1.26 Tatah Patch? Warcraft III: The Frozen Throne It looks like