I have an application that had tooltips in it that worked fine. I loaded a beta copy of CVI on the machine, but had to back it out. Now I have a big problem. I finally just reloaded the entire CVi 5.5 + sp1 on the machine. Tooltips causes the application to freeze under the debugger. The call that causes the crash is in the TT_NewToolTipInfo(). The line in there that calls GetCtrlAttribute() and is commented 'Does a Timer Control for Tooltip mouse-polling exist?' never returns. How can I get my application to work again??