title: NIST randomness test suite returns igamc:UNDERFLOW for most of the tests
body: <p>I have a random sequence of size of 1 million and in order to use the <a href="https://csrc.nist.gov/Projects/Random-Bit-Generation/Documentation-and-Software/Guide-to-the-Statistical-Tests" rel="noreferrer">NIST test suite</a>, I have converted the sequence, which is stored in Windows txt format, into BCD and obviously, the length of file becomes 4 million. So I run the test and set the bitstreams to 1 and select "[0] ASCII - A sequence of ASCII 0's and 1's". But the program shows numerous "igamc: UNDERFLOW" errors. Could anyone explain what is happening?</p>