Issue with Dynamic Panel Model

[Md Anik Islam]

I am trying to run dynamic panel model with 3 rounds of data containing 5020 observations in each round. I am using dependent variable food consumption score and Independent variables Monthly Income, Savings and Remittance Income and year dummies. I have assumed my endogenous variable is lagged dependent variable of food consumption score. I have used following stata code to produce necessary output:

xtabond2 fcs lfcs monthlyincome lmonth savings lsav remitinc lremit yr* , gmm(lfcs ) iv(monthlyincome lmonth savings lsav remitinc lremit) nodiffsargan noleveleq

After running this code: I get this lines as output

Favoring space over speed. To switch, type or click on mata: mata set matafavor speed, perm.
lfcs dropped due to collinearity
monthlyincome dropped due to collinearity
lmonth dropped due to collinearity
savings dropped due to collinearity
lsav dropped due to collinearity
remitinc dropped due to collinearity
lremit dropped due to collinearity
yr1 dropped due to collinearity
yr2 dropped due to collinearity
yr3 dropped due to collinearity
No regressors.
r(481);


Can anybody explain why I am getting this error? I am not sure about what is wrong with my data. I am a newbie while using dynamic panel model. Read arellano bond paper and tried to understand the do file that was used to run the regression models.