Reference: http://jira.secondlife.com/browse/SVC-1505 I'm really worry about each update/upgrade of Havok4 and the case is not apply to all Havok4 region, but in random. Each time there is update/upgrade on Havok4, I may receive a complaint about llSetLinkPrimitiveParams for PRIM_POSITION. Previously, the strange is that, in 1 or 2 days, the issue is gone and the sim handle llSetLinkPrimitiveParams correctly. I'm just test on sim Emaga, and it just failed to make the command to work properly. I really have no idea what happen, cause it happen in random and often happen repeatedly after Havok 4 update on random sim. My test is the same as previous Jira SVC-1505: I make a simple test to do, that create 3 box in a line, with center become the root prim and have this script: default { state_entry() { llSitTarget(<0,0,.1>,ZERO_ROTATION); } touch_start(integer total_number) { vector test=(vector)llGetLinkName(llDetectedLinkNumber(0)); llSetLinkPrimitiveParams(4,[PRIM_POSITION,(vector)test,PRIM_ROTATION,llEuler2Rot((vector)test)]); } } The left and right box have name: <.0,1.0,.0> and <.0,-1.0,.0> So with the script when I was sit on the center box, and touch the left or right box should moved and rotated. And I will try to check the sim each day, and update here. Sincerely, Cecilia Zheng