Question: Strange error is obtained

I have written some statements in maple and when integrating a vector I encounter an error . whats the problem? the error is:

Error, (in evalf/Ei/taylor) unsupported type of index, 1.

F1 := ScalarMultiply(Phi^%T, f);
F := int(F1, x = 0 .. 1);

which f is exp(x-t) and Phi is a vectror.



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