There are disadvantages to open-source ERP that should be considered including the ability to obtain support for the software and the possibility that a company may be on its own in the case of a major system failure that could bring operations to a grinding halt for a period of time. Reliance on external sources for support of an open-source enterprise system may be extremely expensive. Open source ERP gives full flexibility for customization without much compliance & guidance where it comes to business control & system integrity.