fix this 
oserr.nim(94)            raiseOSError
asyncfutures.nim(372)    read
asyncfutures.nim(372)    read
Error: unhandled exception: Too many open files [OSError]
oserr.nim(94)            raiseOSError
asyncfutures.nim(372)    read
asyncfutures.nim(372)    read
Error: