what is this error???? and why happend ?

[bms953]

i create a part and use that as Drive part in some another part, when i want do anything like select Feature , create Sketch , adding Constraint , .... this error appear for me  (((( a Cyclical constraint dependency was detected ))))

i attached file

[bms953]

after i See JDMather and karthur1 post,  i try to download SP1.1 and install that , redraw sketch in new part and put every panel in separate Block ( JDMather advise ) but when i want insert coincident betwen 2 point of Block again ........ look to pic

[bms953]

my system configuration is :

CPU Core i7 3610 QM

VGA ; GForce GTX 660m

Ram : 8GB

HDD : 750 GB

WIN 7 Home Pre

Office 2003

i Update my Windows and Inventor SP

i want know has this error relationship with this config????

[bms953]

interesting , i download a sample file from this forum and try to change for find solution and again this **** error appear.

should i reinstall Inventor ??!!!???!! 

[karthur1]

Probably first try the repair install.  If that doesnt work you could do the reinstall.  Did you install SP1.1?

[bms953]

ok, tnx , yes i Install SP1.1