Calculating a New Variable

Creating a new variable or referencing a variable by name requires surrounding it in curly braces. Variables on the right side of equations may be referenced by two other methods:  First, by the variable index. Second is to use variable assignment letter codes. In this example, we’re using ‘u’ and ‘v’ which represent the variables assigned to the U and V vector components in Plot -> Vector -> Variables dialog.  […]

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Calculating Aerodynamic Forces and Moments

The most accurate forces and moments are normally those output by your flow solver, which knows details of your solution’s boundary conditions and can use modeling such as turbulent wall functions that Tecplot cannot. If your solver’s calculations are not available, you can use Tecplot’s Analyze/Perform Integration… option with the Forces and Moments integration type. There are cases where you want more control over the calculation, however, so this document […]

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Tecplot 360 Will Not Open OneDrive Files

Problem: OneDrive has introduced a new capability called “Files On-Demand” which allows files to be downloaded on-demand. These files are not recognized by the Tecplot file dialog. If you are opening files from a OneDrive folder and receiving an error from the File Dialog, try one of the following workarounds. Solution: Upgrade to Tecplot 360 2017 R3 build 3.1 or later» Turn off Files On-Demand Right-click on the OneDrive folder […]

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Determining number of Cells in an Unblanked region

To determine the number of cells in an unblanked region, follow these steps: Define your region of interest by selecting Plot > Blanking > Value Blanking… to bring up the Value Blanking dialog to set your criteria. Anything that is blanked will be excluded in the following calculation. Once you have set your blanking criteria accordingly, generate the variable Cell Volume via the Analyze>Calculate Variables… menu and selecting it from […]

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Tecplot error at startup: X Error: GLXBadContext

Note:  This should no longer be an issue.  Download the latest release or get a free trial. Problem: Tecplot crashes with X Error: GLXBadContext. Solution: One possible cause could be due to a security issue in Xorg that disables the “indirect mode” in GLX. If that is the case then the solution is to enable the GLX indirect mode.


Partial Border Display on Exported Images (Tecplot 360 EX)

Problem: On some systems, you may see a partial (right side and bottom) black border around an image exported from Tecplot 360EX, even when borders are turned off for the frame. This is caused by an off-by-one issue with some combinations of platforms and graphics drivers. Solution: If your system is affected by this issue, you can address it by adding the following lines to your tecplot.cfg file. You may […]

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Running Tecplot 360/Focus on OS X 10.10 Yosemite

This is not an issue in Tecplot 360 EX. Upgrade to Tecplot 360 EX» Problem: Running Tecplot 360/Focus on Mac OS X 10.10 Yosemite provides the following error: dyld: Symbol not found: _inflateReset2   References from: /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libPng.dylib   Expected in /Applications/Tecplot_360_2013R1/bin/./../lib/libz.1.dylib in /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libPng.dylib ./tec360: line 624:   343 Trace/BPT trap: 5    $ICONSTART “$TECHOME/bin/$EXECUTABLE” $APPFLAG Solution: Mac OS X 10.10 is looking in the Tecplot directory for the libz.1.dylib file to […]

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360 EX Menu Freezes on Ubuntu

Problem: Tecplot 360 EX pull-down menu becomes unresponsive after minimizing on Ubuntu systems. Solution: This can happen because of Ubuntu’s new Unity UI.  You may be able to solve this issue by reverting to an older UI.  You can do this by using one of the methods below: For Ubuntu 17+ the workaround is to remove libstdc++.so.6 and libgcc_s.so.1 from the bin/sys directory. For earlier versions of Ubuntu: On the login screen, […]

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Unable to run Tecplot after upgrading to XQuartz 2.7.5 Mavericks OS X 10.9 (and in some cases 10.8)

Note: Tecplot 360 EX is native to the Mac and doesn’t rely on an X Windows System. Download the latest release or get a free trial. Problem: Unable to run Tecplot after upgrading to XQuartz 2.7.5 on Mavericks OS X 10.9. Solution: If you are running Mavericks OS X 10.9 (and in some cases 10.8) you may have noticed XQuartz has pushed out a new release of XQuartz 2.7.5.  After you have […]

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Error messages compiling Fortran source code using gfortran on Linux

Problem: I get error messages when I try to compile Fortran source code using gfortran on Linux, even though I installed all the necessary “build-essential” gfortran libraries. Unable to compile Fortran source code using gfortran on Linux. Solution: If you are getting error messages when compiling the Fortran source code consider the following. First, the order of calls in the command line is important.  Using Tecplot’s simtest.f90 Fortran source code […]

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