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Hi, To Determine Moments of Inertia Ixx and Iyy: Following conversion of objects into unions, I usually run MASSPROP to determine the centroid location, use UCS>Origin to move the UCS to the centroid and re-run MASSPROP to find Ixx and Iyy. During this procedure, I have to say no to write to file twice, divide the given Ixx and Iyy by 10x10x10x10 or 10000 to have the units to cm^4 and add cm^4 and do stacking at the end. Hence my search for a lisp that can automatically do the above and convert the Ixx and Iyy results from mm4 to cm4 and add cm4 (with stack) at the end of the results even coloring the results to a given color for emphasis. I have also found a lisp called modulus.vlx that calculate section modulus. However the results are in mm3 but the program add cm3 to the number. I want true cm3 results in spite of having drawn everything in acadiso.dwt and with mm units. Thanking you in advance, Regards, Nicolas.

Hi, First of all, I want to wish a Happy New Year 2012 to all and a great thanks for so many direct and indirect solutions, suggestions and guidance that have been of great help to me. Well, to begin this year, I want to start with MASSPROP. Last year, through the forum, I came across modulus.lsp, centroid.vlx, massp.lsp ... all great and powerful lisp. Exploring the issue further, it would be great if solutions can be found for the following: 1. changing the units of moments of inertia from mm4 to cm4 while the units for the drawings remain in mm 2. possibility to rip the text from the massprop command starting "Area ... Principle moments and X-Y ... I .... J .." and paste into mtext with size 2 and a definite color. 3. add cm^4 after the Ix and Iy results 4. Cancel the "Write Analysis to a file [Yes/No] " ... like a Peditaccept variable but in this case we want the answer to be N and pertaining to MASSPROP 5. The relationship between Moments of Inertia and Principle Moments and X-Y direction about centroid. 6. To boost things further: a lisp tutorial based on MASSPROP, how to rip the different value for user-defined output Thanks in advanced, Regards, Nicolas.