PROC LCA sample size limitation

[YL_SAS_User]

I am experiencing a sample size limitation when running PROC LCA in SAS and would appreciate any guidance.

My dataset contains approximately 1 million observations, but PROC LCA fails to run when the sample size exceeds about 245,000 observations. When I reduce the sample size below this level, the procedure runs successfully.

Does PROC LCA has a known sample size or memory limit?

Are there any recommended options or alternative approaches in SAS for performing latent class analysis on datasets of this size?