Error while using size(A,1)?

Hello, I am trying to evaluate the number of rows of a certain matrix 'Conn' using

d = size(Conn,1)

If I initialise the matrix from an empty workspace like this

Conn = [1 2 3; 4 5 6]

the command displays the correct answer

d = 2

When using the exact same command inside a bigger script, I get this error message:

Subscript indices must either be real positive integers or logicals.

Anybody has a clue?

Thanks.

Answer 1

[Sean de Wolski]

You have a variable names size.

Rename this variable and clear it.

[Alessandro]

Looks like the most obvious answer usually is the correct one. Thank you so much, I was gonna get crazy on this!