Take your original mdb, and try to compile the code....

(just go ctrl-g, and then while looking at code go debug-compile).

Note that as a general rule, my fingers after editing code will go alt-d,
<enter key>

and then a ctrl-s

The above keys happens so often, and so fast that I can't even remember
doing it anymore. The trick here is to always compile your code. If you
don't compile code, then often inteli-sense will stop working. Only until
you fix all errors, does it come back.

Worse, if you edit some code, and close the code window, then it will
re-open when you return to the code window (ms-access still thinks you need
to work on that code since you did not compile it). So, not compiling your
code means all kinds of code windows open up when you return next time. And,
not compiling means that inti-sense often breaks, again, it can't work when
you got errors. And, last, but not least, with errors in your code, you
can't make a mde..

So, try compiling your code to find the error(s), and fix them (this is why
a mde is such a good idea, as you don't want distribute code with syntax
errors in it).

Once your code compiles...then you should have no problem making a mde...