JSL Error When Requesting Number of Columns in a Matrix

[#1]

I have the following data table:

I imported this data table into a JSL matrix

Data1 = Data Table( Current Data Table() ) << Get All Columns As Matrix;

This produced the following matrix named Data 1 :

[ 23 24 25 26, 

22 23 . ., 

23 22 . .]

I requested the number of columns in this matrix:

c = ncol(Data1);

This generated the following error message:

Cannot set value for the column 'C' because the row number (0) is not valid. in access or evaluation of 'Assign' , :c =  /*###*/N Col( Data1 ) /*###*/

I would appreciate any help understanding the error message and/or how to get the number of columns in Data1.

Thank you.