Error Messages/42532

Error Message

In the call to MatrixMultiply, the same index (J) is specified for both indexes of the second matrix. An
array cannot be indexed twice by the same index.  If you desire to specify a vector, then omit one of the 
index parameters.

Cause

A call such as:

MatrixMultiply(A,I,J,B,J,J)

Since the same index is specified twice, the implication is that B is indexed twice by J -- that it is both the row and column index. The rules of Analytica's intelligent arrays preclude an array being indexed twice by the same index, so this doesn't make sense.

Remedy

If you intended B to be treated as a vector, then the syntax would just omit the last index parameter:

MatrixMultiply(A,I,J,B,J)

See Also

• MatrixMultiply