### Frequently Asked Questions (FAQ)

##### Troubleshooting

**Q. How to fix the error message "API library is
not found" when clicking on Solve?**

**A. **Copy the files *lmdep.fll* and *lmdepa.fll* from the
installation directory (usually C:\Program Files\Logic Minimizer) to the system directory (usually
C:\Windows\System32).

##### Features

**Q. Does Logic Minimizer give the most simplified
expression?**

**A. **Yes! The expression with the least number of
terms and with the least number of literals is always returned.

**Q. Does Logic Minimizer support operation priority e.g. in
a<->b->c**?

**A. **Of course! Logic Minimizer has powerful formula
handling capabilities! You do not need to explicitly enter a<->(b->c)
for Logic Minimizer to recognize that implication (->) has higher
precedence than equivalence(<->). However complex your formulae are,
Logic Minimizer will always respect the operation precedence rule!

##### Speed

**Q. Is the time-taken to minimize a function in sum of product form
and product of sum form the same?**

**A.** For lower order variables function (1-4), the time-taken is almost
the same. Beyond 4 variables, product of sum (POS) is calculated
faster than (SOP) if the total number of "ones" and "don't care" in your
function is more than half the maximum number of possible terms for that
function.

For example, a 12-variable function has 2^{12} = 4096 maximum
possible terms. If the function you want to minimize has more than 2048
terms, a product of sum (POS) form will be calculated faster than a sum
of product (SOP) form.

**Q. Are two different functions with the same number of terms
and same number of variables calculated at the same speed?**

**A.** Not necessarily. Functions with clustered terms (those than can be
combined with neighboring terms in one or more ways) are evaluated
slower than isolated terms (those that cannot be combined with
neighboring terms).

**Q. What is the estimate time-taken to compute a particular
function above 4 variables?**

**A.** Any 8-variable function takes on average a couple
of seconds to be computed on an 1.6 GHZ processor.

##### Registration

**Q. Why is my email address not being accepted when I make a
purchase?**

**A. **Some email addresses are not accepted for
security reasons. In such cases, you will have to use another email
address. You may sign up freely for AOL Mail
to get an accepted email address.