@SanctumZero 

I don't have anything assigned to the exact letters involved in the code we're looking at. I do however have a function Y(u) defined, and a value assigned to u[0]. Perhaps that causes a problem? It ought not to, but thinking about it, I have seen before that Maple has troubles if you assign something to for example f[1], and later attempt to use just f in some form of code

@SanctumZero 

I don't have anything assigned to the exact letters involved in the code we're looking at. I do however have a function Y(u) defined, and a value assigned to u[0]. Perhaps that causes a problem? It ought not to, but thinking about it, I have seen before that Maple has troubles if you assign something to for example f[1], and later attempt to use just f in some form of code

@Joe Riel 

Sorry, the code appears not to have been copied correctly:

diff~(<x(u),y(u)>,u)=<<-alpha,alpha>|<beta,-gamma>>.<x(u),y(u)>;

That's the line, that fails...

@Joe Riel 

Sorry, the code appears not to have been copied correctly:

diff~(<x(u),y(u)>,u)=<<-alpha,alpha>|<beta,-gamma>>.<x(u),y(u)>;

That's the line, that fails...

Thank you for your reply. I don't think a size limitation is the cause (in my case), though. An example of a command that fails in a document, I'm working on now, is the following:


    > diff~(,u)=<|>.;

Which will throw this error:

    Error, tables cannot be mixed with other container objects in an elementwise operation.

There are no functions defined on x and y, just a 4-element matrix multiplied by a 2-element vector. So the internal representation of either the matrix or the vector on the right hand side must be malfunctioning.

Whenever this happens, I can take the command from my large document and copy it into a fresh doc and execute and no errors will be thrown.

Thank you for your reply. I don't think a size limitation is the cause (in my case), though. An example of a command that fails in a document, I'm working on now, is the following:


    > diff~(,u)=<|>.;

Which will throw this error:

    Error, tables cannot be mixed with other container objects in an elementwise operation.

There are no functions defined on x and y, just a 4-element matrix multiplied by a 2-element vector. So the internal representation of either the matrix or the vector on the right hand side must be malfunctioning.

Whenever this happens, I can take the command from my large document and copy it into a fresh doc and execute and no errors will be thrown.