Why FullDefinition does not work in MathLink mode?

*To*: mathgroup at smc.vnet.net*Subject*: [mg120548] Why FullDefinition does not work in MathLink mode?*From*: Alexey Popkov <lehin.p at gmail.com>*Date*: Thu, 28 Jul 2011 07:55:27 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

Hello, When working with MathKernel in interactive session without of the FrontEnd, FullDefinition works as expected: In[1]:= a=2;FullDefinition[a] Out[1]= a = 2 But when trying to use it in MathLink mode one get ReturnPacket with unevaluated FullDefinition: In[1]:= kernel=LinkLaunch[First[$CommandLine] <> " -mathlink"]; LinkRead[kernel]; LinkWrite[kernel,Unevaluated[a=2;FullDefinition[a]]] LinkRead[kernel]//FullForm Out[4]//FullForm= ReturnPacket[FullDefinition[a]] The built-in parallelization functions have the same problem: In[2]:= ParallelEvaluate[a=2;FullDefinition[a]]//FullForm Out[2]//FullForm= List[FullDefinition[a],FullDefinition[a]] One workaround is to use ToString: In[3]:= ParallelEvaluate[a=2;ToString[FullDefinition[a]]] Out[3]= {a = 2,a = 2} Why FullDefinition returns unevaluated in MathLink session although it works as expected in interactive MathKernel session? Is it possible to make it working without any glitches? Any ideas?

**Follow-Ups**:**Re: Why FullDefinition does not work in MathLink mode?***From:*Leonid Shifrin <lshifr@gmail.com>