In the era of Crystal Reports 8.5, 9, and 10 (and early versions of Visual Basic), the engine relied on COM (Component Object Model). The primary DLL was often referred to as the library. While robust for its time, this architecture is now obsolete. It relies on 32-bit processing and has significant limitations regarding memory management and modern security protocols.
This is the most misunderstood aspect of the runtime engine. sap crystal reports runtime engine