Torquay United manager Chris Hargreaves says a "disgraceful" decision to award Bristol Rovers a penalty and send off Angus MacDonald cost his side a win.
The game ended in a 1-1 draw following Matty Taylor's spot-kick equaliser after MacDonald was adjudged to have pulled an opponent's shirt.
"If you're going to get a penalty for something like that you'd have 30 in a game," Hargreaves told BBC Radio Devon.
"It's a nonsense, it's disgraceful really," the 42-year-old added.
The decision to award the penalty was given by the assistant referee with seven minutes to go after Duane Ofori-Acheampong had given Torquay an early lead.
It is not the first time this season that Hargreaves has been critical of the standard of officiating in the Conference.
In October, he was after asking to speak to a referee and the following month, he called for
"It's very important that we get these points, and for someone's error to deny us of the three points I feel hard done by," said Hargreaves.
"I like Simon (Bennett), the referee, he's alright, but he's got to show more strength because if 8,000 fans are calling for a penalty you've got to be strong if it's not one, and it wasn't.
"It's put a sour on a day that we should have come out with three points. We've lost a player now because the linesman's not good enough."