Not run with Wprime version 1.55? Looks like 1.53.

Hello, checked the date of post result wPrime 1.55 did not exist.

1.55 became the only allowed version on 01.01.08, before that it was more like "anything goes", apart from a cheatable version (that was 1.4x if I remember correctly, not 1.53, so this version was allowed at the time)