A search for pair produced charged Higgs bosons has been performed in the h
igh energy data collected by DELPHI at LEP with root s = 161, 172 and 183 G
eV. The analysis uses the tau nu tau nu, c (s) over bar tau nu and c<(sc)ov
er bar>s final states and a combination of event shape variables, di-jet ma
sses and jet flavour tagging for the separation of a possible signal from t
he dominant W+W- and QCD backgrounds. The number of selected events has bee
n found to be compatible with the expected background. The lower excluded v
alue of the H+/- mass obtained by varying the H+/---> hadrons decay branchi
ng ratio has been found to be 56.3 GeV/c(2). (C) 1999 Published by Elsevier
Science B.V. All rights reserved.