Running version: 1.3.6.50#dev
Python version: 2.7.16
Operating system: Linux-4.19.0-kali5-amd64-x86_64-with-Kali-kali-rolling-kali-rolling
Command line: sqlmap.py -r /****/sqlmaptest.txt --level=4 --risk=3 -p password
Technique: None
Back-end DBMS: MySQL (fingerprinted)

Traceback (most recent call last):
  File "sqlmap.py", line 180, in main
    start()
  File "lib/core/decorators.py", line 71, in _
    result = f(*args, **kwargs)
  File "lib/controller/controller.py", line 571, in start
    injection = checkSqlInjection(place, parameter, value)
  File "lib/controller/checks.py", line 461, in checkSqlInjection
    boundPayload = agent.prefixQuery(fstPayload, prefix, where, clause)
  File "lib/core/agent.py", line 234, in prefixQuery
    expression = unescaper.escape(expression)
  File "lib/core/unescaper.py", line 26, in escape
    return self[identifiedDbms](expression, quote=quote)
  File "plugins/dbms/firebird/syntax.py", line 32, in escape
    if isDBMSVersionAtLeast("2.1"):
  File "lib/core/common.py", line 3153, in isDBMSVersionAtLeast
    version = float(filterStringValue(version, '[0-9.]')) + correction
ValueError: could not convert string to float: