Hi Michael,

Thanks for your post here!

First, let me suggest to take a look at the Tolerancing example in the ZOS-API Syntax Help. It will show you the code for setting up the tolerancing and running it:

Regarding how to pull the tolerance histogram and yield data, before pulling these data, you need to use the Tolerance Wizard to set tolerances, then run Tolerancing, and save the results as a ZTD file. Once, the ZTD files are ready you can retrieve the data with the yield and histogram analyses. I have written some python code for these operations, please allow me to refer to these code snippets. Please find below the corresponding lines and find my .py files for python standalone applications attached. The files will also show you how to change the settings for the Yield and Histogram analyses:

#Get Tolerance Histogram

newTolHistogram = TheSystem.Analyses.New_TolerancingHistogram()

newTolHistogramSettings = newTolHistogram.GetSettings()

newTolHistogramSettings.UseSystemTolerances()

#change settings here if needed

#run Tolerance Histogram

newTolHistogram.ApplyAndWaitForCompletion()

# get Tolerance Histogram results

TolHistogramResults = newTolHistogram.GetResults()

numDS = TolHistogramResults.NumberOfDataSeries

for i in range(numDS):

    series = TolHistogramResults.DataSeries[i]

    numCurves = series.NumSeries

    xData = series.XData.Data

    yData = series.YData.Data

    numPoints = xData.Length

    for j in range(numPoints):

        print(f'{xData[j]}: {[yData[j, k] for k in range(numCurves)]}')

For the Tolerance Yield, it works very similarly, but you will see it from the attached file.

Finally, to run your own tolerance script, you need to select it as the criterion for tolerancing (in the UI shown below):

I hope this helps, but if you have any further questions, please let us know and we will be happy to help!

Best,

Csilla