c# - Unable to load "lpsolve55.dll" in VS2015 on 64-bits OS -


for project working on, need solve mathematical model. chose using microsoft.solver.foundation , solverfoundation.plugin.lpsolve plugin. both associated .dll files these extension seem work fine, vs2015 recognizes , references them without problem , compiles , runs program without errors.

this untill try solve optimization, needs "lpsolve55.dll" work. have downloaded dll , put in project's bin/debug folder, kind of reason vs2015 doesn't recognize it. i.e.

  • i can't reference browsing "add reference" tab.
  • it's impossible (un-)register via regsvr32 cmd-prompt application, doesn't have dll (un-)registry entry points.
  • the tlbimp.exe cmd-prompt application can't handle it.

so basically, after discovering above (after trying most-common internet solutions), still feel quite dissatisfied error message while try solve optimization -

unable load dll 'lpsolve55.dll': specified module not found. (exception hresult: 0x8007007e)

the wierd part have project in solve similar problem, there absolutely no problems @ using lpsolve55.dll....

some quick facts:

  • i reference .net framwork 4.5.2. have changed 4.5 4.0, didn't change anyting.
  • for far can tell, bin/debug folder of projects identical.
  • i working on updated windows 10 os, 64 bits, while using visual studio 2015.

my question whether or not of have encountered similar problem , if able solve in way.

highly appreciated!

after careful analysis, have found answer problem. honest, things are, quite simple in end. lpsolve55.dll wasn't recognized because didn't have new bin-folder in path, did have old project. forgot.

on further note however, after lpsolve55.dll directory added path, still got error telling me there no model found solve directive. since error occured when calling lpsolverdirective(), research landed me on following page:

http://lpsolve.sourceforge.net/5.5/msf.htm

above page gives complete , stable way of how acces lpsolve55.dll using lpsolverplugin straight out of microsoft.solver.foundation.dll. after following method in link involves editing projects' bin/debug , bin/release folders, got lp model , running within no-time.

morale of story - read documentation. bit of beginner in programming entire multi-project solutions , using customly-added dlls, helps else experiencing same. in end, learned lot trying different methods of getting work, no time wasted.


Comments

Post a Comment

Popular posts from this blog

jOOQ update returning clause with Oracle -

according http://www.jooq.org/doc/3.8/manual/sql-building/sql-statements/update-statement/ jooq doesn't support returning clause in update statements databases except firebird , postgres. does know, still correct oracle jooq? according oracle's documentation, oracle db supports returning clase delete, insert, or update statements. incorrect manual you're right - manual wrong , should fixed: https://github.com/jooq/jooq/issues/5470 single row update returning jooq 3.8 added support single row update .. returning statements. internally, uses callablestatement , pl/sql block of form: begin update "my_table" set "my_table"."column" = 'xyz' "my_table"."id" = 1 returning "my_table"."id", "my_table"."column" ?, ?; ? := sql%rowcount; end; the relevant issue is: https://github.com/jooq/jooq/issues/5190 multi row update returning a...
Read more

java - Warning equals/hashCode on @Data annotation lombok with inheritance -

i have entity inherits other. on other hand, i'm using lombok project reduce boilerplate code, put @data annotation. annotation @data inheritance produces next warning: generating equals/hashcode implementation without call superclass, though class not extend java.lang.object. if intentional, add '@equalsandhashcode(callsuper=false)' type. is advisable add annotation @equalsandhashcode (callsuper = true) or @equalsandhashcode (callsuper = false) ? if not added, 1 callsuper=false or callsuper=true ? the default value false . 1 if don't specify , ignore warning. yes, recommended add @equalsandhashcode annotation on @data annotated classes extend else object. cannot tell if need true or false , depends on class hierarchy, , need examined on case-by-case basis. however, project or package, can configure in lombok.config call super methods if not direct subclass of object. lombok.equalsandhashcode.callsuper = call for configuration system ...
Read more

java - BasicPathUsageException: Cannot join to attribute of basic type -

i using java 8 jpa (hibernate 5.2.1). have clause works perfectly, until introduce clause make use foreign key table values too. i getting following error: basicpathusageexception: cannot join attribute of basic type i think problem related fact have join table, , not sure how create join using join table. employee - employee_category - category model (employee.java): @manytomany(cascade = cascadetype.all, fetch=fetchtype.eager) @jointable ( name="employee_category", joincolumns={ @joincolumn(name="emp_id", referencedcolumnname="id") }, inversejoincolumns={ @joincolumn(name="cat_id", referencedcolumnname="id") } ) private set<category> categories; model (category.java): @id private string id; jpa when introduce following code, fails error above (i think problem new piece of code): join<t, category> category = from.join("id"); predicates.add(criteriabuilder.like(category....
Read more