GSL ERROR: vector length n must be positive integer in init_source.c at line 29 errno 4

[forRoma1889]

gemma -bfile plink -epm 50kPi_bslmm.param.txt -emu 50kPi_bslmm.log.txt -ebv 50kPi_bslmm.bv.txt -k output.cXX.txt -predict 1 -o bslmm_Pi
I had some problems running this command.

Before running this command, I executed the following two commands:

gemma -bfile plink -gk 1 -o output  
gemma -bfile plink -bslmm 1 -o 50kPi_bslmm  

Both commands ran successfully and generated the following files:

• 50kPi_bslmm.bv.txt
• 50kPi_bslmm.gamma.txt
• 50kPi_bslmm.hyp.txt
• 50kPi_bslmm.log.txt
• 50kPi_bslmm.param.txt
• output.log.txt
• output.cXX.txt

gemma -bfile plink -epm 50kPi_bslmm.param.txt -emu 50kPi_bslmm.log.txt -predict 1 -o test_output
GEMMA 0.98.3 (2020-11-28) by Xiang Zhou and team (C) 2012-2020
Reading Files ...

number of total individuals = 99

number of analyzed individuals = 99

number of covariates = 1

number of phenotypes = 1

GSL ERROR: vector length n must be positive integer in init_source.c at line 29 errno 4

But now I have this problem. I checked the previous files and found no problem. I sincerely ask for your answer