# \*ERROR in cascade: the DOF corresponding to node 1 in direction 1 is detected on the dependent side of a MPC and a SPC **URL:** \ **Category:** General Questions\ **Created:** [December 26, 2022, 4:56am UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644 "2022-12-26T04:56:39Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![PaoPao1970](https://avatars.discourse-cdn.com/v4/letter/p/d9b06d/32.png) [@PaoPao1970](https://prepomax.discourse.group/u/PaoPao1970)\ **Post date:** [December 26, 2022, 4:56am UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/1 "2022-12-26T04:56:39Z")
I would like to evaluate simple contact analysis. But prepomax show below error. Could you let me know how to set parameter ? ![Figure](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/997061d6c56be3f7e0a4f86ca2de8831da260c56.jpeg) ---
**Author:** ![PaoPao1970](https://avatars.discourse-cdn.com/v4/letter/p/d9b06d/32.png) [@PaoPao1970](https://prepomax.discourse.group/u/PaoPao1970)\ **Post date:** [December 26, 2022, 5:48am UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/2 "2022-12-26T05:48:01Z")
Sorry very much … I found type miss on above figure. ![Figure](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/21976a38afcd39b909c88f6d221e0a927c6a5936.jpeg) ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [December 26, 2022, 9:11am UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/3 "2022-12-26T09:11:00Z")
If the whole part is fixed, boundary condition and contact acting in the same region are causing overconstraint. Use rigid body constraint instead of fixed BC for that rigid part. ---
**Author:** ![PaoPao1970](https://avatars.discourse-cdn.com/v4/letter/p/d9b06d/32.png) [@PaoPao1970](https://prepomax.discourse.group/u/PaoPao1970)\ **Post date:** [December 31, 2022, 5:01am UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/4 "2022-12-31T05:01:46Z")
Dear FEAnalyst san, Thank you very much!!! If possible,Could you help chkeck my program ? I don’t know why my problem can not run … ![test](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/b9e3ca354977f2e6d27612579f564c53fca2c58e.jpeg) [test.pmx](https://prepomax.discourse.group/uploads/short-url/4V5qzS2NhnX53BrZg0ihaYfAgKv.pmx) (595.9 KB) ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [December 31, 2022, 9:03am UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/5 "2022-12-31T09:03:32Z")
I was thinking about applying rigid body constraint to that small cube in the middle (if it’s supposed to be undeformable). ---
**Author:** ![PaoPao1970](https://avatars.discourse-cdn.com/v4/letter/p/d9b06d/32.png) [@PaoPao1970](https://prepomax.discourse.group/u/PaoPao1970)\ **Post date:** [December 31, 2022, 10:30pm UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/6 "2022-12-31T22:30:48Z")
Dear FEAnalyst san, Thank you very much for your kindly reply!!! I changed my code… But Analysis failed… ![test](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/34a84534cc25c558eae25f4c06e941797fa618c6.jpeg) ![Monitor](https://global.discourse-cdn.com/free1/uploads/prepomax/original/1X/613e39427d10d7966539d4f897cc7e7fe96baa02.jpeg) ---
**Author:** ![PaoPao1970](https://avatars.discourse-cdn.com/v4/letter/p/d9b06d/32.png) [@PaoPao1970](https://prepomax.discourse.group/u/PaoPao1970)\ **Post date:** [December 31, 2022, 10:48pm UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/8 "2022-12-31T22:48:21Z")
[test.pmx](https://prepomax.discourse.group/uploads/short-url/rl4tXnWF4z1xDJcXuL7Bccyvur6.pmx) (606.6 KB) ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [January 1, 2023, 11:11am UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/9 "2023-01-01T11:11:35Z")
It will work if you apply the boundary condition to the reference point instead of applying it directly to the part. ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [January 1, 2023, 3:43pm UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/10 "2023-01-01T15:43:18Z")
Hi Pao, Check the effect of increasing or reducing de K parameter. [Contact.pmx](https://prepomax.discourse.group/uploads/short-url/mwsWAsiUYhVqjk9Ls3jJ6BXI7vF.pmx) (41.2 KB) ---
**Author:** ![PaoPao1970](https://avatars.discourse-cdn.com/v4/letter/p/d9b06d/32.png) [@PaoPao1970](https://prepomax.discourse.group/u/PaoPao1970)\ **Post date:** [January 2, 2023, 12:17am UTC](https://prepomax.discourse.group/t/error-in-cascade-the-dof-corresponding-to-node-1-in-direction-1-is-detected-on-the-dependent-side-of-a-mpc-and-a-spc/644/11 "2023-01-02T00:17:16Z")
Dear FEAnalyst san, ANYS san, Thnak you very much!!! My code run well!!