Start the translation by either double-clicking the mapping file you selected in Creating_a_Custom_Mapping_File.htm, or by clicking OK in the Set Translation Parameters dialog. The FME will begin the translation, and you’ll see information in the log window.
The amount of time the translation takes depends on different factors that may include the processing power of the FME host machine, the size of your dataset, and the amount of processing that FME has to do.
In most cases, however, a translation will take a few minutes at most, and the Log view will display TRANSLATION SUCCESSFUL upon completion. You can scroll back through the log to check specific statistics.
What If a Translation Fails?
If you see a message that says TRANSLATION FAILED, the FME log will often be the best source to find out what went wrong. Usually it will be something simple, like a missing file. Sometimes, however, you will have to perform some troubleshooting on either your source data or on the mapping file. If you have edited your mapping file, the problem could be as simple as a missing backslash.
More Information:
A good source of information and help is FME Talk. You can also search the mailing list archive for similar circumstances.
What Next?
You have completed the steps involved in a performing a translation using a default mapping file. The output from the translation is the output filename you specified in the beginning.