https://community.qlik.com/t5/Talend-Studio/tAssertCatcher-or-tLogCatcher/m-p/2214355#M11234 Use tLogCatcher. Even if you use OnComponentError or OnSubjobError, tLogCatcher will be triggered as well if it's set to catch Java exceptions. Fri, 05 Oct 2012 05:56:22 GMT alevy 2012-10-05T05:56:22Z https://community.qlik.com/t5/Talend-Studio/tAssertCatcher-or-tLogCatcher/m-p/2214354#M11233 Hi,<BR />I use TIS 3.2.3 (about to migrate to 5x) and I'm trying to identify the best way to handle errors. I don't see the main difference between tLogCatcher and tAssertCatcher.<BR />I saw relationships between tDie, tWarn and tLogCatcher, as well as the one between assert and tAssertCatcher, but when a "null pointer exception" occurs or whatever, what is from your experience the way to handle them and what components should be used to be warned to correct the problem?<BR />I noticed that when OnComponentError or OnSubjobError flows are used, both tLogCatcher and tAssertCatcher are inoperatives (or am I wrong?)<BR />Thanks for your comments. Thu, 04 Oct 2012 16:29:55 GMT https://community.qlik.com/t5/Talend-Studio/tAssertCatcher-or-tLogCatcher/m-p/2214354#M11233 Anonymous 2012-10-04T16:29:55Z https://community.qlik.com/t5/Talend-Studio/tAssertCatcher-or-tLogCatcher/m-p/2214355#M11234 Use tLogCatcher. Even if you use OnComponentError or OnSubjobError, tLogCatcher will be triggered as well if it's set to catch Java exceptions. Fri, 05 Oct 2012 05:56:22 GMT https://community.qlik.com/t5/Talend-Studio/tAssertCatcher-or-tLogCatcher/m-p/2214355#M11234 alevy 2012-10-05T05:56:22Z https://community.qlik.com/t5/Talend-Studio/tAssertCatcher-or-tLogCatcher/m-p/2214356#M11235 OK, thanks, I'll use it. Mon, 08 Oct 2012 14:52:08 GMT https://community.qlik.com/t5/Talend-Studio/tAssertCatcher-or-tLogCatcher/m-p/2214356#M11235 Anonymous 2012-10-08T14:52:08Z