• The maximum size of a line in an IPF source file is 255 characters.

• The maximum number of fonts in a source file is 16.

• The maximum number of unique words in a compiled file is 64 000.

• The maximum number of unique words in a panel is 64 000.

• The maximum number of panels is 64 000.

• The maximum number of external databases is 255.

• Do not exceed 16 000 words, numbers, and punctuation marks between two consecutive heading tags in your source file. This includes blank spaces, but does not include commented lines (see Comment).

These maximum limits are not absolute. Activity in the operating system can cause them to vary.