Problem starting BC.Exe in DOS 5.02

[Kernelpanic]

We are trying to run certain .exe programs on a IBM 486 running DOS 5.02 to make sure they are backwards compatible. When attempting to compile an QBasic 4.5 program with BC.EXE we get the following error and would like to know how to solve it.: 

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runtime error R6002
- floating point not loaded

Note: This is not a Windows error and we have all the necessary drivers loaded.

QuickBasic 4.5 automatically uses a coprocessor if it is present. Otherwise, QB uses software routines to emulate a coprocessor. One can also force emulation by using SET NO87= or 0.

The error message looks more like the compiler/linker not found. How are the path settings, or are there none at all?