hp prime programing with symbolic matrix

[kain_x_x]

Hello.
Sorry for this long long long delay.

No, I'm not writing a CAS mode program. It's a normal program where I'm triying to make some cas operations.

Now Im triying with:
z:=cas(MAKEMAT(1,"c(2)"));

It says that the code is fine, but when I'm runing the program it returns that it's a bad argument value (without stop the program).

what I'm trying to do:
Make a matrix considered as symbolic matrix where i can put some symbolic elements.
For example. In Matlab y can type:

Z=sym(ones(1,m)) to make an ones matrix considered as symbolic to put all type elements.

What it returns:
bad argument value.

Thanks for your help and again, sorry for the delay.