RoboTask forum

So i just started evaluating and so far i really like what robotask can do.  Was working with Automation Anyware and Robotask is a better program hands down! 
My problem is i work with a lot of empty files.  i need to write "if" statements about empty files.  or not so empty files.  but everything i try either works both ways (if or if not) or doesn't work at all.  could you help me find the best way to do this?
example:
If {FileSize(G:\temp\nb{ShortYear}{MonthNo}{IncDays(-1)})} equal or less than 0
   Move file here
end if
 

You are correct. Variable {FileSize()} returns 0 for empty files and more than 0 if file is not empty

You can write the following construction:

If {FileSize(G:\temp\nb{ShortYear}{MonthNo}{IncDays(-1)})} = 0 then
   move file G:\temp\nb{ShortYear}{MonthNo}{IncDays(-1)} to another folder
else
   do something else
end if

This example processes only single file witn name G:\temp\nb{ShortYear}{MonthNo}{IncDays(-1)}. But you said about lot of empty files.
Maybe you want to sort many files. In this case you have to use "File loop" action. I can write a small example for you if needed.

Describe in more detail, please, if I haven't understood you correctly.

well its typically only one file per folder/job so i'm not to worried about loops... 
i tried it again adding the "else" which i didn't have before, and it didn't seem to matter if the file was empty or not it still moved it. 
so i tried to do a "less than 0" thinking that maybe there was information in the file i couldn't see, and it renamed the file empty or not... 
my current task:
if {FileSize(G:\temp\nb{ShortYear}{MonthNo}{IncDays(-1)})} less than 1 then 
move file G:\NBEEFXFR\nb{ShortYear}{MonthNo}{IncDays(-1)  
else
rename G:\NBEEFXFR\1nb{ShortYear}{MonthNo}{IncDays(-1)   end if
so i figure i gotta be doin something wrong or i'm on the very brink of having it perfect!  any more insight would be appreciated!

Send me your whole task to me oleg(at)robotask.com
Maybe I'll find some mistakes.

I've try the small test, this works fine. I haven't understood what is the problem?

Are you sure that your file is not locked by another application at the moment when you try to move it?

See my example below:

;**********************
;* RoboTask Task file *
;* Do not edit!       *
;**********************

[Root]
ActionAfterRun=INTEGER|0
Actions=FOLDER
Automat=INTEGER|-1
CatID=INTEGER|1740897579
ContinueOnError=INTEGER|0
ExternalName=STRING|"Task216"
Hide=INTEGER|0
ID=INTEGER|624556337
Name=STRING|"detect empty files"
Priority=INTEGER|3
RunOnClose=INTEGER|0
RunOnStartup=INTEGER|0
ToLog=INTEGER|3

[Actions]
Action1=FOLDER
Action2=FOLDER
Action3=FOLDER
Action4=FOLDER
Action5=FOLDER
Action6=FOLDER

[Actions\Action1]
ActionID=STRING|"A_LOOP_FILE"
Enabled=INTEGER|-1
Name=STRING|"File Loop"
Params=FOLDER

[Actions\Action1\Params]
createmode=STRING|"1"
date1=STRING|"20070912"
date2=STRING|"20070912"
destvar=STRING|"FFF"
DuringDays=STRING|"1"
DuringMonths=STRING|"1"
file0=STRING|"C:\incoming\*.*"
filecount=STRING|"1"
OlderDays=STRING|"1"
OlderMonths=STRING|"1"
savesize=STRING|"0"
searchkind=STRING|"0"
subdirs=STRING|"0"
timesize=STRING|"0"
WithoutPath=STRING|"0"

[Actions\Action2]
ActionID=STRING|"A_FLOW_IF"
Enabled=INTEGER|-1
Name=STRING|"If Then"
Params=FOLDER

[Actions\Action2\Params]
case=STRING|"0"
operator=STRING|"5"
type=STRING|"1"
value1=STRING|"{FileSize({FFF})}"
value2=STRING|"1"

[Actions\Action3]
ActionID=STRING|"A_DIALOG_MESSAGE"
Enabled=INTEGER|-1
Name=STRING|"Show ""File {FFF} is empty"""
Params=FOLDER

[Actions\Action3\Params]
icon=STRING|"1"
msg0=STRING|"File {FFF} is empty"
msgcount=STRING|"1"
playsound=STRING|"0"
showmessage=STRING|"1"

[Actions\Action4]
ActionID=STRING|"A_FILE_COPY"
Enabled=INTEGER|-1
Name=STRING|"Copy/Move File"
Params=FOLDER

[Actions\Action4\Params]
destdir=STRING|"c:\trash"
f_count=STRING|"1"
file0=STRING|"{fff}"
ifexists=STRING|"1"
move=STRING|"1"
subdir=STRING|"0"

[Actions\Action5]
ActionID=STRING|"A_FLOW_ENDIF"
Enabled=INTEGER|-1
Name=STRING|"End If"

[Actions\Action6]
ActionID=STRING|"A_LOOP_END"
Enabled=INTEGER|-1
Name=STRING|"End Loop"

if {FileSize(G:\temp\nb{ShortYear}{MonthNo}{IncDays(-1)})} less than 1 then ...

BTW: I think that you have to use string
{FileSize(G:\temp\nb{ShortYearIncDays(-1)}{MonthIncDays(-1)} {IncDays(-1)})}
instead of your string

well apparently it is the loop command with variable assignment i need.  seems kinda strang but that is the only difference between what i had and what you showed me, and yours works perfectly.  but thats ok for me i can definatly make it work in the future! 
And as far as i can tell {FileSize(G:\temp\nb{ShortYear}{MonthNo}{IncDays(-1)})} works perfect for yesterdays date.  tried both ways and both did exactly the same thing!
Thanks for all your help Oleg!

{FileSize(G:\temp\nb{ShortYear}{MonthNo}{IncDays(-1)})}

This will work incorrectly at 1-st day of each month and at 1-st day of the year

ah now i see this difference!!  thanks again!