Hi
Add a tMap after tAssertCatcher, define three output tables and add filter condition to filter the assertion that comes from different tAssert component, for example, add a filter expression for out1 as below:
row1.origin.equlas("tAssert_1")
out1 will be written into log1.txt.
....tMap--out1--tFileOutputDelimited_1 (log1.txt)
--out2--tFileOutputDelimited_2 (log2.txt)
--out3--tFileOutputDelimited_3 (log3.txt)
Shong