How do you clear history in CATIA?

If you are a regular user of CATIA V5 like I am then you may have run across this error: "operation cannot be completed because part is already in session. Please close the session to complete the operation." This error may occur because of a scenario like this:

I open a Product that contains Part A, Part B, and Part C. I open Part D, modify it, and close it. According to the Desk, Link, and

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Theo Jansen Mechanism Matlab Code

I shared my m-code for the Theo Jansen mechanism awhile ago (LINK) but one of our readers recently created his own version of the program and offered to share it with us. Truong Duc Binh says:


"I programed for two legs and now I am making a computer interface with it, user can input parameters for Jansen walking machine. I divide this window form to two modes, you can simulate with constant

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VUE: VERICUT Users’ Exchange Meetings 2011

If you are using VERICUT at your company, please make every effort to attend.  There is no charge to you and lunch will be served. You will have the opportunity to get a first-hand look at the new features in VERICUT 7.1. You will also discover how others are using VERICUT, and learn what new features are planned for the future. Click here to view the complete agenda.


You can register at

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Keyboard Shortcuts for 3D Via Composer

Here are a couple of nice Windows keyboard shortcuts for Dassault's 3D Via Composer.Short Cut | ResultTab: creates temporary ghost image of the element underneath the pointerShift+Tab: reverses tab key actionK: Permenently hides the elements that are displayed as ghost images by the tab keyT: hides or shows collaborative elementsCrtl+T: show all elementsCrtl+I: Inverts the current selection Crtl+

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Common G-Codes for CNC Programming

G00 Rapid positioning On 2- or 3-axis moves, G00 (unlike G01) traditionally does not necessarily move in a single straight line between start point and end point. It moves each axis at its max speed until its vector is achieved. Shorter vector usually finishes first (given similar axis speeds). This matters because it may yield a dog-leg or hockey-stick motion, which the programmer needs to

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