Sometimes you get an unexpected combination of input data and the system barfs all over you.

Jim Cara wanted a vanity license tag that would make people laugh.

But when he chose “NOTAG” for the plate on his Suzuki Hayabusa, a sleek blue and silver motorcycle with a speedometer that reaches 220 mph, the joke backfired.

The new tag arrived Saturday under an avalanche of Wilmington parking violations.

“All the traffic tickets say, ‘Notice of violation. License number: no tag,’ ” Cara said.

City computers, talking to state Division of Motor Vehicles computers, had finally found an address for ticketed vehicles that lacked license tags: Cara’s home in Elsmere.

“I messed up the system so bad,” Cara said. “I wonder if they can put me in jail or something?”

He has received more than 200 violation notices. The mail carrier came twice on Saturday. Cara opened a few. They ranged from $55 to $125 for violations such as meter expirations.

Fortunately, they’re going to correct the problem in the system, but I find it kind of amusing.  I guess no one thought that anyone would ever try to actually use “NOTAG” as a valid license number.