Aspen Technology (NASDAQ:AZPN), a provider of software to the process industries, ticked 5% lower Thursday after reporting a fourth quarter loss from a year ago profit, driven primarily by worse-than-expected revenues.

The company posted net loss of $33.97 million, or 37 cents a share, compared with a profit of $10.2 million, or 11 cents a share in the same quarter last year.

The results fell below average analyst estimates of a 22-cent loss, according to a Thomson Reuters poll.

Revenue for the Burlington, Mass.-based company was $38.3 million, down from $71.3 million a year ago, and missing the Street’s view of $44.81 million.

Aspen CEO Mark Fusco said the fourth quarter marked a “strong finish” to its fiscal year, noting the combination of customers moving to its new aspenONE licensing model as well as expanded usage drove quarterly and annual earnings.

Despite the worse-than-expected performance, Aspen posted record product related bookings and a $537 million increase in contractually committed future cash collections associated with the company’s subscription and multi-year term contracts.