Why do I get an invalid interpreter on my annotation request?

TBox10=annotation('textbox',[.13,.39,.17,.085],'String', ...
{'\alpha\Beta\Gamma\delta\epsilon\zeta\eta\theta\iota\kappa', ...
'\Lambda\mu\nu\xi\pi\rho\sigma\tau\upsilon\phi\chi\psi\Omega'}, ...
'BackgroundColor',[.5,.5,1])

 TBox10 = 

TextBox (\alpha\Beta\Gamma\delta\epsilon\zeta\eta\theta\iota\kappa…) with properties:

             String: {2x1 cell}
           FontName: 'Helvetica'
           FontSize: 10
         FontWeight: 'normal'
              Color: [0 0 0]
    BackgroundColor: [0.5000 0.5000 1]
          EdgeColor: [0 0 0]
          LineStyle: '-'
          LineWidth: 0.5000
           Position: [0.1300 0.3900 0.1700 0.0850]
              Units: 'normalized'

Show all properties

 Warning: Error updating TextBox.

 String must have valid interpreter syntax:
\alpha\Beta\Gamma\delta\epsilon\zeta\eta\theta\iota\kappa
\Lambda\mu\nu\xi\pi\rho\sigma\tau\upsilon\phi\chi\psi\Omega

Answer 1

[Walter Roberson]

See http://www.mathworks.com/matlabcentral/answers/14751-greek-alphabet-and-latex-commands-not-a-question and notice the description of the grey shading

There is no \Beta just B and \beta

[Kenneth Lamury]

Using student version R2016a required me to use ALL lower case letters when using Greek letters. Thus, I assume there are no capital Greek letter, n'est pas?

[dpb]

AFAIK there's no difference in content of Student version, the only one of your string I had to lower-case was Beta; rest were fine and according to the doc <Interpreter> there are a half-dozen or so included, just Beta isn't one that is...

Answer 2

[dpb]

'Beta' isn't available; 'beta' is. That seems to fix it here...