A search was performed in $\mathrm{e}^+\mathrm{e}^-$ collisions for 
charginos with masses close to the lightest neutralino mass. Events 
were selected if they had a high-energy photon from initial state 
radiation, reducing the dominant two-photon background to a negligible 
level. No significant excess over Standard Model expectations has been 
observed. Lower limits were derived on the chargino pair-production 
cross-section, and upper limits on the chargino mass were derived in 
the context of the Minimal Supersymmetric Standard Model.