Gear Outputs Limited to 100 Files
With Flywheel 19.0.0 gear jobs with more than 100 output files will fail in addition to truncating to 100 output files and providing a log warning message.
In version 18.1 we added a warning message to the log that output number was truncated to 100 and that this job will fail in a future version (19.0). See the gear specification for more details.
The solution for handling more than 100 output files is to design the gear to use zip to combine multiple files for output.