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If using the name command in a multi-line formula, one of the quote marks is missing.
One of the lines in a multi-line formula exceeds 255 characters in length.
After performing all the necessary Library substitutions, a single formula is more than 1024 characters in length.
One of the formulas has the same name as one of the variables. For example, the lines S=m3; and S() = S1() – S2(); would cause this error.