Change temporary folder for intermediate calculation data files

Sometimes when modelling large PLAXIS project files with e.g. a lot of phases or a lot of steps, Plaxis may indicate that there is not enough disk space available:

• PLAXIS 2D AE and PLAXIS 3D store all unsaved data in the Windows temporary folder (TEMP). By default, this is located on the primary disk drive in the user profile. Only when explicitly saving the Plaxis project data, this data will be stored in (i.e. moved to) the actual save location.
• Next to that, during a calculation all intermediate results (step files) are kept in the same location, and only when the phase calculation has finished, will the data be post-processed by keeping the number of result step files as specified in the Max number of steps stored parameter for that phase, and deleting the other data.

When this issue of not enough free disk space appears, you can use one of these available work arounds:

1. Store the Windows TEMP folder on a disk with larger space. To do so, open Windows’s Control panel, and go to System > Advanced System settings, and in the tab Advanced, open the Environment Variables... window. Here you can set the current user’s variable TEMP to the desired new location. Note: the user might need to have administrator rights to perform this.
2. For projects with a lot of phases, it may help to not calculate the entire Plaxis project in one go, but to calculate a part of the Plaxis project, save the model, and calculate the remainder of the Plaxis project. By saving the data halfway the calculation phases, the data stored in the Windows TEMP folder will be moved to the final save location, freeing up disk space for the Windows TEMP folder.
   Note that this can be automated using the commands runner,e.g.
       calculate Phase_1
       save
       calculate Phase_2
       save
       calculate Phase_3
       save
       etc.
3. For dynamic calculations only the data for a step is stored, not for a dynamic substep. If not all intermediate results need to be kept, or if not for each step a data point for the curve points is needed, the number of additional steps (Max steps) can be reduced. Please make sure to simultaneously increase the number of dynamic substeps, such that the product Max steps * Number of sub steps is kept constant, see this article: Time step used in dynamic calculation
4. Since PLAXIS 2D AE.02 and PLAXIS 3D AE, there is an option to store the intermediate calculation result data in a different location. This is especially useful when for instance running a long dynamics calculation with a lot of steps in a single phase and the above mentioned options do not give the solution for enough free disk space. In order to change the location of this intermediate calculation data, the program needs to be launched with an additional parameter, called --CALCDIR. Example: to start PLAXIS 2D AE/2015 and later from the default installation folder while setting the calculation folder (CALCDIR) to D:\PlaxisCalc\
   "C:\Program Files (x86)\Plaxis\Plaxis 2D\Plaxis2DXInput.exe""--CALCDIR=D:\PlaxisCalc\"
   For PLAXIS 3D AE this would be:
   "C:\Program Files (x86)\Plaxis\Plaxis 3D\Plaxis3DInput.exe""--CALCDIR=D:\PlaxisCalc\"
   This can be used in e.g. a DOS command, in Windows Start menu’s Run..., from a batch file (*.bat), or be defined in a Windows shortcut.

Please be aware when moving the folder where the intermediate (calculation) results are stored (option 1 and 4) to a disk with less read/write speed, it may lead to a longer calculation time.