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<div class="">I would like to alert people using GSAS-II scripting to a change in the API that may require changes to scripts. This will only affect people who use scripting to simulate TOF patterns. </div>

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When originally written, the <a href="https://gsas-ii.readthedocs.io/en/latest/GSASIIscriptable.html#GSASIIscriptable.G2Project.add_simulated_powder_histogram" class="">G2Project.add_simulated_powder_histogram</a>() was intended to take as input TOF times in

 milliseconds. Due to a bug it was actually using times in microseconds. It was also computing TOF patterns on linear grid rather than on a log grid and was using the time-step incorrectly. I have corrected all this and updated the function documentation (found

 here: <a href="https://gsas-ii.readthedocs.io/en/latest/GSASIIscriptable.html#GSASIIscriptable.G2Project.add_simulated_powder_histogram" class="">https://gsas-ii.readthedocs.io/en/latest/GSASIIscriptable.html#GSASIIscriptable.G2Project.add_simulated_powder_histogram</a>). 

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<div class="">These changes will require a change in the times supplied to <a href="https://gsas-ii.readthedocs.io/en/latest/GSASIIscriptable.html#GSASIIscriptable.G2Project.add_simulated_powder_histogram" class="">G2Project.add_simulated_powder_histogram</a> in any

 scripts used to simulate TOF patterns for those scripts to run after an update to version 4469 or later. I am sorry for this. </div>

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<div class="">Brian</div>

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