Cant save variable?? "To save this variable, use the -v7.3 switch."

What does this mean? And how do I resolve it?

>> save NARRtroughid NARRtroughid
Warning: Variable 'NARRtroughid' cannot be saved to a MAT-file whose version is older than 7.3.
To save this variable, use the -v7.3 switch.

Answer 1

[Fangjun Jiang]

type "help save" you will see some explanation regarding save Version Compatibility Options. The thing mentioned for v7.3 is that it supports for data items greater than or equal to 2GB. Is your variable a very large data?

[andrew joros]

my data is only about 58MB. I have never experienced this before.

Answer 2

[andrew joros]

I got it working. I guess it saves to a .mat that is 58mb but the actual size is about 3GB.

[Fangjun Jiang]

What do you mean? What is the size of your variable NARRtroughid?