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The interface to the tile server of OpenStreetMap has changed in the first quarter of 2020. No tiles can be downloaded with the old interface.

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If no time series is defined in meteo.def, the LASAT tool DefCheck hangs on checking the project.

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In case an absolute reference date is given in param.def and the boundary layer version 5.2 or 5.3 with the Coriolis parameter 1.1e-4 1/s is given in meteo.def, LASAT applies for a time series calculation and the stability classes Klug/Manier IV and V (unstable) according to the standard VDI 3783/8 (2017) a mixing layer height that depends on the month of the year. However, LASAT only uses the month of the reference date, without any further update in course of the time series. Tests have shown that this error has only little effect on the result.

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The plume rise calculation with PLURIS (flag PLURIS) is internally carried out at the beginning of a new interval of the meteorological time series. This is usually sufficient as also source parameters do usually not change at smaller intervals (both being defined as hourly averages). However, if source parameters required for the plume rise calculation change before meteorological data do, this change is not taken into account.

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The tool Lopxtr reads LASAT concentration files and checks the consistency of day indices in the file name and number of files. Index i2 of the last file minus index i1 of the first file plus one is the number of files, n = i2 - i1 + 1. A problem occurs if the index changes from 9999 to 10000 (does not occur in typical situations): On internal sorting, the file name with index 10000 is the first and the one with index 9999 the last. This gives n = 9999 - 10000 + 1 = 0 and the tool notes that something is wrong and aborts with an error message.

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