With complex layouts, the routing process can take several hours. For this reason, a backup is done at intervals (approximately every 10 minutes). Depending on the number of routing jobs, there is a corresponding number of job files. The file name_xx.job always contains the last status of the jobs, where xx stands for the number of the variant, always beginning with 00.
If the job is interrupted for any reason (for example, a power failure) the processing time invested to that point is not lost, since you can recall the status saved in name.job. Load your board file in the Layout Editor, then enter:
AUTO;
Answer the prompt as to whether Autorouter should recall (Continue existing job) with Yes. Autorouter will then continue from the position at which the job was last saved. (A maximum of 10 minutes may be lost.)
If autorouting is interrupted using the stop icon, the file name_xx.job remain intact and can be recalled. This may be useful when you have started a complex job on a slow computer and want to continue with it on a fast computer as soon as one is available.
Changing parameters before recalling will not influence the job, since it will have been saved together with the parameters which were valid at the time of the initial Autorouter start.
When Autorouter has finished, the routed board is saved as name.b$$. You can rename it and use it, for instance, if a power failure occurred after the autorouting run and you could not save the board file. This file is deleted automatically after the board has been saved.