The Program is embedded in the documentation Only few programmers want to split their programs in fragments and to organize these as parts of the documentation
Language mixing The mix of three languages in a single document is not attractive
Documentation language, programming language, WEB interconnection language
Reading and comprehension problems in the WEB-source files
Extra level in error handling Error handling is more complicated because the errors need to be mirrored in the WEB source program
Reasonable solutions exist
Paper orientation Most existing tools are oriented towards printed paper presentation of the literate program
Despite these problems the original ideas and tools remain to be very interesting and attractive for skilled and motivated users