rstan is not a S4 object
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Description
Summary:
I install successfully rstan on macOS and linux. The former could compute but the latter ran immediately in an error after the the beginning of the sampling.
Description:
SAMPLING FOR MODEL 'lda' NOW (CHAIN 4).
Error in FUN(X[[i]], ...) :
trying to get slot "mode" from an object (class "try-error") that is not an S4 object
Calls: stan ... sampling -> sampling -> .local -> sapply -> lapply -> FUN
In addition: Warning message:
In parallel::mclapply(1:chains, FUN = callFun, mc.preschedule = FALSE, :
4 function calls resulted in an error
Execution halted
RStan Version:
2.18.2
R Version:
3.4.4
Operating System:
macOS 10.14.5
ubuntu 18.04.2
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Research direction
Start by reproducing the reported sampling failure on Ubuntu 18.04.2 with RStan 2.18.2 and R 3.4.4, comparing it with the successful macOS run. Investigate the parallel sampling path shown in the error and verify that the lda model completes without the non-S4-object error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- r
- Domain
- data
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100