From Xojo Documentation
Called when an error occurs during the upload process.
One example of what could cause this event to fire would be if the file got to the server and a processing error occurred, such as 413 ENTITY TOO LARGE.
|-1||An unknown error occurred.|
|0||No error has occurred.|
|1||The upload cannot proceed because no files were specified.|
|2||The upload cannot proceed because there is already an upload in progress.|
|3||The upload cannot proceed because the number of files provided exceeds the MaximumFileCount.|
|4||The upload cannot proceed because the total size of the files provided exceed the MaximumBytes value.|
|100||The upload failed because the data was corrupt when it arrived at the server.|
|101||The upload failed because the file could not be created on the server.|
|102||The upload failed because the server ran out of memory.|
|103||The upload failed because the file could not be saved on the server.|