Opencv_traincascade- is it not possible to train opcncv_traincascade with just 26 samples or less?

Question

I am trying to run this code in terminal

C:\Ankit\VirEnv\opencv\build\x64\vc15\bin\opencv_traincascade.exe -data cascade/ -vec C:\Ankit\VirEnv\pos3.vec -bg neg.txt -w 24 -h 24 -negPos 20 -numNeg 1000 -minHitRate 0.9

This is my output

(env) PS C:\Ankit\VirEnv> C:\Ankit\VirEnv\opencv\build\x64\vc15\bin\opencv_traincascade.exe -data cascade/ -vec C:\Ankit\VirEnv\pos3.vec -bg neg.txt -w 24 -h 24 -negPos 20 -numNeg 1000 -minHitRate 0.9
PARAMETERS:
cascadeDirName: cascade/
vecFileName: C:\Ankit\VirEnv\pos3.vec
bgFileName: neg.txt
numPos: 2000
numNeg: 1000
numStages: 20
precalcValBufSize[Mb] : 1024
precalcIdxBufSize[Mb] : 1024
acceptanceRatioBreakValue : -1
stageType: BOOST
featureType: HAAR
sampleWidth: 24
sampleHeight: 24
boostType: GAB
minHitRate: 0.9
maxFalseAlarmRate: 0.5
weightTrimRate: 0.95
maxDepth: 1
maxWeakCount: 100
mode: BASIC
Number of unique features given windowSize [24,24] : 162336

===== TRAINING 0-stage =====
<BEGIN
OpenCV: terminate handler is called! The last OpenCV error is:
OpenCV(3.4.16) Error: Bad argument (> Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file.
> ) in CvCascadeImageReader::PosReader::get, file C:\build\3_4_winpack-build-win64-vc15\opencv\apps\traincascade\imagestorage.cpp, line 158

I am getting this error

OpenCV(3.4.16) Error: Bad argument (> Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file.
> ) in CvCascadeImageReader::PosReader::get, file C:\build\3_4_winpack-build-win64-vc15\opencv\apps\traincascade\imagestorage.cpp, line 158

I only have 26 sample, I have tried to mess with Pog value and the minHitRate vale but still this error is there, i don't know what to do next. Is it not possible to do this with just 26 sample? is it necessary to have more than 26 sample to make this work.