I have noticed llSetLinkPrimitiveParams function problem in new beta havok4 simulators. When avatar sits on non linked single prim it is possible to change its params using this function with linknumber = objects prims + 1 for avatar, soo in one prim object avatar has 2 linknumber and it is fine, but when i link my root object with other objects and try to change avatar parameters it doesnt work, for example for 7 prim object avatar should be 8 prim. Everything was fine before introducing havok4 and my scripts are working fine in no havok4 simulators. this is the line from my script that doesnt work with root prims that are linged with any others, and only in new simulator. llSetLinkPrimitiveParams(llGetObjectPrimCount(llGetKey())+1,[PRIM_POSITION, cur_pos+z_offset]); The parcel i experience this problem is: Odessa Grand I have noticed as well that all "sitting" positions are a little bit higher then before in havok4 that makes all poseballs not coordinated correctly as they used to be.