Issue I452 [80,rec,enhancement,resolved] Add charge weighting factor (CWF) to Data Recording output and add new ion_cwf reserved variable. As of 8.0.4-TEST19, the CWF can be enabled for data recording. The REC format has been extended to support this selection. The REC format remains backward and forward compatible with earlier versions of SIMION. Furthermore, user programs can read or write the CWF through a new "ion_cwf" reserved variable. ion_cwf has the same segment access permissions as ion_charge. Comment: This capability also allows the following useful trick. Any CWF specified in an .ION input file can be carried over to the CWF field in the Data Recording output. This is true even if charge repulsion effects are disabled, in which case SIMION otherwise ignores the CWF field, but you may use the CWF field for your own purpose to carrying over user-defined data concerning individual particles between input and output files. Requested by igor-20071024. Implemented in 8.0.4-TEST19.