conditional analysis error: Error: too many SNPs. The number

Thanks so much for the GCTA tool, really a wonderful resource.  My sample size in .ma file is greater than SNP count, but I still got the following error, could you please help?

I have got an error for running GCTA as below:

    Error: too many SNPs. The number of SNPs in a joint analysis should not be larger than the sample size.

Options:
--bfile EUR_AllChr.phase3_V5a_norm.7
--chr 7
--maf 0.01
--extract chr7.40.condional_analy_snplist_maf001.rmSampleSize0
--cojo-file ma_file_conditional_analysis_input.rm_sampleSize0.tab
--cojo-joint
--out chr7.40.condional_analy_snplist_maf001.rmSampleSize0.out


log file regarding snp count:
Calculating allele frequencies ...
Filtering SNPs with MAF > 0.01 ...
After filtering SNPs with MAF > 0.01, there are 3329 SNPs (436 SNPs with MAF < 0.01).

sample sizes in .ma file
-bash-4.1$ mo ma_file_conditional_analysis_input.rm_sampleSize0.tab
SNP A1 A2 freq b se p N
rs2326918 a g 0.8441 -0.0083 0.0097 0.3887 471990
rs186244095 a g 0.9994 0.3533 0.3087 0.2524 180659
rs7929618 c g 0.1378 0.007 0.0102 0.4925 472815
rs66941928 t c 0.7972 0.0057 0.0094 0.5468 473380
rs151222586 a g 0.9936 0.0535 0.0606 0.3772 374210
rs6039163 t c 0.0038 -0.0093 0.0632 0.8827 374210
rs146253013 t c 0.0052 0.0177 0.0572 0.7563 374210
rs6977693 t c 0.8504 -0.0099 0.0099 0.3153 472986
rs12364336 a g 0.8681 -4e-04 0.0104 0.971 472090
rs7190157 a c 0.3709 -0.0022 0.0073 0.7655 472712
rs148258120 t c 0.9993 -0.0685 0.1337 0.6083 374210
rs12562373 a g 0.7522 0.0031 0.0081 0.699 473380
rs142545482 t c 0.9996 -0.0681 0.2889 0.8137 173677



Many thanks,

Bolan