Operating System Error
Operating System Errors may vary from OS to OS. In older versions of Business Rules! errors in the 4200 series were all Operating System Errors. The error number was calculated internally by BR by adding 4200 to the OS Error Number. Sometimes the resulting error code exceeded 4299 which conflicted with Unix / Linux error codes. Therefore in 4.16 this method was been replaced by generating BR errors 4300 and 4320, in combination with SysErr$ and SysErr.
But most importantly, check the value of the variables SysErr and SysErr$ for a description of the error.
For more information about Microsoft DOS and Windows OS Error Numbers see:
Operating System Error 72 - Print or disk redirection is paused. 267 - The directory name is invalid.