Hook horror cavernblend

Syntax seems to be messed up. Here's the log: The Underdark [Exits: east west] <289/537hp 227/729m 497/514mv 13897tnl (19:00) indoor/cave> sca You scan north. You scan south. You scan east. You scan west. You scan up. You scan down. <289/537hp 227/729m 497/514mv 13897tnl (19:00) indoor/cave> cavernblend Huh? <289/537hp 227/729m 497/514mv 13897tnl (19:00) indoor/cave> cavernblend Huh? <289/537hp 227/729m 497/514mv 13897tnl (19:00) indoor/cave> caveblend Huh? <289/537hp 227/729m 497/514mv 13897tnl (19:00) indoor/cave> cavble Huh? <289/537hp 227/729m 497/514mv 13897tnl (19:00) indoor/cave> caverbl Huh? ----------------- I tried a few more combinations, thinking it was a typo, but couldn't figure it out. I also tried it out in Kobold caverns, same result.