This message can occur when booting PrecisionTree if:
There are two entries in the DTOOLS.INI file, which is located in the WINDOWS directory, that control how PrecisionTree launches Excel during bootup. The relevant section of this INI file looks like:
[EXCEL]
EXCEL32=C:\Program Files\Microsoft Office\Office
EXCELEXE=Excel.exe
The EXCEL32 entry should point to the directory which contains the Excel executable. There should not be a trailing backslash in the entry. The name of the executable file (e.g. Excel.exe) should not be appended to the end of the path.
The EXCELEXE entry should have the name of the executable file. Usually this will be "EXCEL.EXE", but occasionally system administrators will rename the Excel executable to some other name.