Error 999999: error executing function

Today, when arcGIS is used for projection, it is mainly carried out in the WGS84 coordinate system.

But ArcGIS kept reporting errors.

Compared with various methods, this problem has not been solved.
And then finally, with the guidance of the great God, we found the root of the problem, it turned out that the latitude and longitude had been reversed, and the projection had to be longitude, latitude, something like that.
Let’s make sure that this doesn’t happen again.

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