We can't help much without an exact transcript of what you're seeing...your descriptions aren't quite enough for us.
It is likely you have quotes in there, or you're missing quotes, based on a google search for ":schema missing wget" and poking around the first few links. Try putting quotes around the URL. The question mark character in there can throw bash off. You probably want a space after -O as well. wget --user=user --password=user " http://192.168.254.33/jpg/image.jpg?size=3" -O /home/pi/Pictures/image.jpg -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/80fc3493-915a-4d25-93eb-c5a1071c59d5n%40googlegroups.com.