PCA using Statistica

While trying to do PCA using Statistica, I am receiving the following error message:

The percentage of valid cases (65.67%) for variable files is less than the required minimum percentage of valid cases (80.00%). The analysis stops.

How to solve this issue?

I have 40 variables which I want to compare on the basis of their presence in 44 files, the names of which I kept at the last column as a separate variable.

Please help.