var "LIBSE"
            type        chooser
            label       "Use LIBSE?  -----------------------------"
            default     0
            choices
                "Yes" "echo %SE1%|'%SE2%'|'%SE3%'|'%SE4%'^'asm_flags=%L1-ASM%'|'rank=%L1-RANK% >> %in1%.in;"
                "No" ""

        var "L1-rank"
            type        number
            label       "order for use in assembly (rank) "
            min         1
            max         4
            default     1 

        var "SE1"
            type        file
            label       "SE Read 1"
            default     ""

        var "SE2"
            type        file
            label       "SE Read 2"
            default     ""

        var "SE3"
            type        file
            label       "SE Read 3"
            default     ""

        var "SE4"
            type        file
            label       "SE Read 4"
            default     ""

        var "SE-asm"
            type        combobox
            label       "Use reads for "
            default     2
            choices
                "contigs only"    "1"
                "scaffolds only"  "2"
                "contigs and scaffolds"    "3"