Question: Solve of equation of complex function

There is a enought complex function H(y) of one variable (includding definite integrals and 3 parameters). One needs to solve equations like that H'(y)=H''(y)=0 and build surface in parametrical space with respect to such solutions. Straightforward method leads to 'Warning, solutions may have been lost' for solve command. How to reformulate problem to become it solvable?

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