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The decay $Z_c(3900)^\pm\to\omega\pi^\pm$ is searched for using data samplescollected with the BESIII detector operating at the BEPCII storage ring atcenter-of-mass energies $\sqrt{s}=4.23$ and $4.26$~GeV. No significant signalfor the $Z_c(3900)^\pm$ is found, and upper limits at the 90\% confidence levelon the Born cross section for the process $e^+e^-\toZ_c(3900)^\pm\pi^\mp\to\omega\pi^+\pi^-$ are determined to be $0.26$ and $0.18$pb at $\sqrt{s}=4.23$ and 4.26 GeV, respectively.

Search for $Z_c(3900)^\pm\to\omega\pi^\pm$