Warning: Unable to display symbolic object because 'symengine' was reset. Repeat commands to regenerate result.

Applying cramer's rule for a 2x2 matrix to solve for constants C_1 and C_2 but keeps returning "Unable to display symbolic object because 'symengine' was reset. Repeat commands to regenerate result". Hopefully not making an elementary error but recently updated to 2024a version and been having error message for other codes. I'm using syms, as I'm not provided with spring constant, n, or xi. Therefore I treat them as scalar variables. I appreciate any pointers/tips to resolve this problem. Thanks.

%Clamped and Rotational Spring
clc
clear all
format short g 
syms k n xi
a = [(1-(k/2)), (1-k); (1/6), (1/2)];
x = [((k*(1)^(n+2))/((n)*(n+1)*(n+2)))-((1^(n+1))/((n)*(n+1))), (1-k); ((1)^(n+3))/((n)*(n+1)*(n+2)*(n+3)), 1/2];
y = [(1-(k/2)), ((k*(1)^(n+2))/((n)*(n+1)*(n+2)))-((1^(n+1))/((n)*(n+1))); 1/6, -((1^(n+3))/((n)*(n+1)*(n+2)*(n+3)))];
determinant_a = det(a)

determinant_a = 

determinant_x = det(x)

determinant_x = 

determinant_y = det(y)

determinant_y = 

C_1 = determinant_x * (determinant_a)^-1

C_1 = 

C_2 = determinant_y * (determinant_a)^-1

C_2 = 

f = (((xi)^(n+3))/((n)*(n+1)*(n+2)*(n+3))) + (C_1)*(((xi)^(3))/(6)) + (C_2)*(((xi)^(2))/(2))

f = 

[Torsten]

Runs here without problems (see above).

Below is the link to a forum contribution of someone who got the same warning message. But I can't imagine that not enough RAM could be the reason in your case.

https://uk.mathworks.com/matlabcentral/answers/500686-unable-to-display-symbolic-object-because-symengine-was-reset

[Alexander Gaudreau]

Very strange... I have enough storage. I'm thinking of downloading previous version which when I used syms had no problems. Possible bug?

[Torsten]

Possible bug?

Maybe. You don't seem to be the only one with this problem:

https://uk.mathworks.com/matlabcentral/answers/2105231-avoid-warning-unable-to-display-symbolic-object-because-symengine-was-reset-repeat-commands?s_tid=srchtitle

You should report it to Technical Support as a potential bug.

[Alexander Gaudreau]

Can you provide link where to send request?

[Torsten]

https://uk.mathworks.com/support/contact_us.html

Product Usage > Report a bug

Answer 1

[Harald]

Hi,

this seems to be due to a bug in R2024a which is fixed with the Update 1 release that is expected to become available to all users by end of next week (April 18).

The bug is specific to using Symbolic Math Toolbox together with clear all. I typically discourage using clear all as this clears more than necessary in most cases:

https://de.mathworks.com/help/matlab/ref/clear.html#btdyzbv-1-ItemType

If you still experience issues without using clear all or after installing the update release, please contact Technical Support for further investigation.

Best wishes,

Harald

[Alexander Gaudreau]

Thank you very much! This fixed the issue.