Ok...so there were some missing main posts of threads, and thus those "decapitated" threads didn´t appear in the postlist. I wrote a script that made the first post of such a thread to the main post, basically I set Parent=0 and Main= the value to the not anymore existing main post. Now, those threads still don´t appear in the post list.
Attached is the comparison of a "normal" thread main posts, and a "non visible" thread main post. I would like to know which variable and the setting is responsible for the thread not showing up.
I finally found the cause... Indeed B_Topic had to be set to 1 in order for a thread to appear in the postlist. Don't know what I did wrong that it didn't work the last time I did this, but now it works and all the old threads that had this problem(around 9000) now apear in the poslist of their forums.
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