Build error Caught IOException when trying to copy files

Hello,

Sometimes when I build a BPM project in NWDS I get this error,

Caught IOException "C:\NWDSWS.jdi\LocalDevelopment\MINSUR_BPM\demo.com\bpm_hrsolpos_v2\_comp\gen\default\public\def_cmp\lib\moin\demo.com_{bpm_hrsolpos_v2}def_cmp.zip (the process doesn't have acces to the archive because it's been used by another process)" when trying to copy files from "C:\NWDSWS.jdi\LocalDevelopment\t2\CAC172530F2EFDDCD642AFD09DBA1782\default\" to "C:\NWDSWS.jdi\LocalDevelopment\COMP_BPM\demo.com\bpm_hrsolpos_v2\_comp\gen\default\"

Anyone knows how to solve this?

Regards

SU