A lawyer for a Dallas man trying to divorce the man he married in Massachusetts told a Texas appeals court Wednesday that his client is entitled to a divorce because he had a valid marriage.

But the Texas Attorney General's Office argued before the three-judge 5th Texas Court of Appeals panel that the marriage isn't recognized by Texas, so they cannot get a divorce. Jimmy Blacklock, an assistant Texas solicitor general, said the men's union can only be voided.

"The parties lack standing to file a divorce case because they're not married," he said.

The Dallas men wed in 2006 in Massachusetts, where gay marriage is legal, and separated two years later.

Attorney General Greg Abbott appealed a Dallas state district judge's ruling in October that granted a divorce to the men and said the state's same-sex marriage ban violates equal rights guaranteed by the U.S. Constitution.

Abbott is also appealing an Austin judge's ruling this spring that granted a divorce to two women married in Massachusetts.