Help: Table exists but isn't eraseable!

Hello World, I'm asking a very simple but opaque Thing: I have played with create table and create temp table .. and now I've got the problem: If I want to create a table called manipluation, the isql answers with: 310: Table (igrdb.manipulation) already exists in the database. If I try to get Table Info from the isql menu, there is no such a table: Not in the proposings and if I type this name into the input field, isql says: 839: Table not found.839: Table not found. What can I do to solve this? Is this problem related to any temporary table - where were they stored? (sqlturbo 4.00) Thanks in advance for any hints Ingo ps: Merry Christmas! * " *O** ****O " " O ****** " ******* O O ******** " *********O***** " "O**********" " ***O**||****O** " || ~ ~ ~ ~ ~ ~~ ~~ ~~ ~ ~ ~