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170

Dran-View 6 User Guide

Math

Channels

(Continued)

The “Status” column consists of one icon per math channel. The icons have the

following meanings:

Icon Description Explanation

Formula OK This formula can be or is calculated.

Required channel

not present

A channel that is used in this formula cannot be

found.

Likely causes:

§ No such channel exists in this file

§ The channel referred to exists in another site

§ The channel name is misspelled

No formula entered

The formula is empty.

Illegal recursion The formula uses some other user-defined formula. A

user-defined formula may consist of a combination of

pre-defined formulas.

Likely causes:

§ You have changed the name of one or more formula.

§ You have imported one or more functions from a DV6 or DFF file, which have names

identical to or contain referenced to formulas already present on your system.

Required site not

present

A site that is used in this formula cannot be found.

Likely cause:

§ There are too few sites present in the document.

§ The site number is misspelled.

Syntax error The formula is malformed.

Likely causes:

§ You have misspelled the name of one or more functions used in the formula

§ One or more functions used in the formula has been deleted

§ You have imported the formula from a DV6 or DFF file, but one or more formulas used

by the formula is missing.

§ You have imported the formula from a DV6 or DFF file emanating from a newer version

of Dran-View, containing expressions your system does not have.

§ You have mistakenly typed 'garbage' signs while designing the formula

§ You have forgotten or placed one or more channel, function or parameter delimiters

("[", "]", "(", ")" or ";" in the wrong position.

§ The formula starts or begins with an operator (+,-,*,/)

§ An operand is missing between two operators

§ An operator is missing between two operands

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