Insufficient number of outputs from right hand side of equal sign to satisfy assignment.

[app.Sis.Slippage]
ans =

  Columns 1 through 17

     0     9     9     9     6     9     6     6     6     0     0     0     0     0     0     0     0

  Columns 18 through 34

     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0

  Column 35
  
     0
     
  b1 =

  Columns 1 through 17

     0    90    90    90    60    90    60    60    60     0     0     0     0     0     0     0     0

  Columns 18 through 34

     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0     0

  Column 35

     0   
     
     
      [app.Sis.Slippage]=b1
      Insufficient number of outputs from right hand side of equal sign to satisfy assignment.
      

Answer 1

[Stephen23]

Note that the meaning of square brackets is different in the LHS vs on the RHS.

    C = num2cell(b1);
    [app.Sis.Slippage] = C{:}

https://www.mathworks.com/matlabcentral/discussions/tips/847976-tutorial-comma-separated-lists-and-how-to-use-them

[Luca Re]

Ok..it run correctly

but

class(app.Sis(1).Slippage)

ans =

'double'

it's not a cell

[Stephen23]

"but ... it's not a cell"

I do not see any reason why it should be a cell (array).