Limitations

Q: What are the known limitations of Metaencryption?

A: The known limitations are:

• The filenames of the encrypted files must have the same name as the subcircuit definition they contain (with a .inc extension).
• The encrypted files must not be used with a .LIB or .INCLUDE in the netlist. Instead, they must be included through the automatic search path (.OPTION search=...) by referencing the subckt name in a subckt instance.
• No more than 80 characters are allowed in a line; semi colons (;) are not allowed.
• For Star-Hspice 1998.4 and earlier versions, dummy models should be inserted before using the LEVEL 49 model.
• For every .PROTECT you should have an .UNPROTECT statement.
• It is always good to have .PROTECT and .UNPROTECT in the following order:

Recommended	Not Recommended
.SUBCKT	.SUBCKT
.PROTECT	.PROTECT
~~~	~~~
.UNPROTECT	.ENDS
.ENDS	.UNPROTECT

Solution: 40

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